[1] | 1 | Sun Dec 05 12:00:00 2010 Andrew Makhorin <mao@gnu.org> |
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| 2 | |
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| 3 | * GLPK 4.45 (30:0:30) has been released |
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| 4 | |
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| 5 | * glplpx01.c |
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| 6 | A bug (it_cnt) in routine reset_parms was fixed. |
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| 7 | Thanks to Ali Baharev <ali.baharev@gmail.com> for report. |
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| 8 | |
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| 9 | * glpmpl03.c |
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| 10 | A bug (print "text\") was fixed. |
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| 11 | Thanks to Xypron <xypron.glpk@gmx.de> for report. |
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| 12 | |
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| 13 | * glpsql.c |
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| 14 | A precision bug was fixed. |
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| 15 | Thanks to Xypron <xypron.glpk@gmx.de>. |
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| 16 | |
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| 17 | * glpk.tex |
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| 18 | Some typos were corrected. |
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| 19 | Thanks to Robbie Morrison <robbie@actrix.co.nz>. |
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| 20 | |
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| 21 | Thu Jun 03 12:00:00 2010 Andrew Makhorin <mao@gnu.org> |
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| 22 | |
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| 23 | * GLPK 4.44 (29:0:29) has been released |
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| 24 | |
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| 25 | * glpapi14.c glpmpl.h glpmpl01.c glpmpl03.c glpmpl04.c |
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| 26 | Implemented suffixes for variables and constraints. |
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| 27 | |
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| 28 | * glpmpl06.c |
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| 29 | Made changes to allow comment records in CSV files. |
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| 30 | |
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| 31 | * glpapi17.c |
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| 32 | Added and documented new API routine glp_cpp to solve Critical |
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| 33 | Path Problem. |
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| 34 | |
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| 35 | Sat Feb 20 12:00:00 2010 Andrew Makhorin <mao@gnu.org> |
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| 36 | |
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| 37 | * GLPK 4.43 (28:0:28) has been released |
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| 38 | |
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| 39 | * glplib.h, glplib.c, glpenv.h, glpenv.c |
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| 40 | The module glpenv was split into two modules glpenv and glplib. |
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| 41 | |
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| 42 | * glpenv01.c, glpenv03.c, glpenv04.c, glpenv06.c |
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| 43 | The following new API routines were added and documented: |
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| 44 | glp_init_env, glp_free_env, glp_open_tee, glp_close_tee, |
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| 45 | glp_error (macro), glp_difftime. |
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| 46 | |
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| 47 | * glpapi16.c |
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| 48 | New API routine glp_top_sort (topological sorting of ayclic |
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| 49 | digraph) was added and documented. |
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| 50 | |
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| 51 | * glpapi17.c |
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| 52 | A serious bug was fixed in the routine glp_asn_prob_hall. |
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| 53 | |
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| 54 | * glpnpp05.c |
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| 55 | A bug was fixed in the LP/MIP preprocessor (hidden covering |
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| 56 | inequalities). |
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| 57 | |
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| 58 | * glpsql.c |
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| 59 | Some improvements were made in the table driver (NULL data). |
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| 60 | Thanks to Xypron <xypron.glpk@gmx.de> for contribution. |
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| 61 | |
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| 62 | * configure.ac |
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| 63 | Changes were made to use .dylib rather than .so under Mac OS. |
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| 64 | Thanks to Noli Sicad <nsicad@gmail.com> for testing |
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| 65 | |
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| 66 | Wed Jan 13 12:00:00 2010 Andrew Makhorin <mao@gnu.org> |
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| 67 | |
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| 68 | * GLPK 4.42 (27:0:27) has been released |
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| 69 | |
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| 70 | * glpapi01.c, glpapi11.c, glpapi12.c, glpdmx.c |
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| 71 | The following new API routines were added and documented: |
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| 72 | glp_check_dup (check for duplicate elements in sparse matrix); |
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| 73 | glp_sort_matrix (sort elements of the constraint matrix); |
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| 74 | glp_read_prob (read problem data in GLPK format); |
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| 75 | glp_write_prob (write problem data in GLPK format); |
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| 76 | glp_analyze_bound (analyze active bound of non-basic variable); |
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| 77 | glp_analyze_coef (analyze obj. coefficient at basic variable); |
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| 78 | glp_print_ranges (print sensitivity analysis report; replaces |
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| 79 | lpx_print_sens_bnds). |
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| 80 | |
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| 81 | * glpapi20.c |
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| 82 | New command-line options were added to glpsol: |
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| 83 | --glp (read problem data in GLPK format); |
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| 84 | --wglp (write problem data in GLPK format); |
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| 85 | --lp (replaces --cpxlp); |
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| 86 | --wlp (replaces --wcpxlp); |
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| 87 | --ranges (print sensitivity analysis report). |
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| 88 | |
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| 89 | * glpapi06.c |
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| 90 | In the routine glp_init_smcp default value of the parameter |
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| 91 | out_frq was changed to 500 (it was 200). |
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| 92 | |
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| 93 | * glpipp.h, glpipp01.c, glpipp02.c |
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| 94 | The old MIP preprocessor module was removed. |
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| 95 | |
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| 96 | * glpapi09.c |
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| 97 | Now the MIP solver uses the new MIP preprocessor (NPP). |
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| 98 | |
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| 99 | * glplpx03.c |
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| 100 | lpx_write_opb was disabled due to replacing IPP with NPP. |
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| 101 | |
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| 102 | * glpnet09.c |
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| 103 | Kellerman's heuristic to cover edges by cliques was added. |
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| 104 | |
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| 105 | * glplib08.c |
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| 106 | Recognition of special filenames "/dev/stdin", "/dev/stdout", |
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| 107 | and "/dev/stderr" was added. |
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| 108 | |
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| 109 | * glpk.tex |
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| 110 | Chapter "Graph and network routines" was carried out from the |
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| 111 | reference manual as a separate document. |
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| 112 | |
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| 113 | Mon Dec 21 12:00:00 2009 Andrew Makhorin <mao@gnu.org> |
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| 114 | |
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| 115 | * GLPK 4.41 (26:0:26) has been released |
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| 116 | |
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| 117 | * glpapi12.c |
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| 118 | The following new API routines were added: |
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| 119 | glp_transform_row (replaces lpx_transform_row); |
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| 120 | glp_transform_col (replaces lpx_transform_col); |
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| 121 | glp_prim_rtest (replaces lpx_prim_ratio_test); |
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| 122 | glp_dual_rtest (replaces lpx_dual_ratio_test). |
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| 123 | Note that values returned by glp_prim_rtest and glp_dual_rtest |
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| 124 | differ from the ones retutned by the deprecated routines. |
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| 125 | |
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| 126 | * glpnpp*.* |
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| 127 | The LP/MIP preprocessor was essentially re-implemented. |
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| 128 | |
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| 129 | * glpios03.c |
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| 130 | The feature to remove inactive cuts from the active subproblem |
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| 131 | was implemented. |
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| 132 | |
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| 133 | * glpios11.c |
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| 134 | The feature processing cuts stored in the cut pool was improved |
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| 135 | (now it uses estimation of objective degradation). |
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| 136 | |
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| 137 | * glpscg.* |
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| 138 | Obsolete implemetation of the conflict graph was removed. |
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| 139 | |
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| 140 | * glpmpl.h, glpmpl03.c, glpmpl04.c |
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| 141 | FILE was replaced by XFILE to allow using GLPK I/O routines. |
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| 142 | |
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| 143 | * glpsql.c, examples/sql, doc/tables.tex |
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| 144 | The SQL table driver was changed to allow multiple arguments |
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| 145 | separated by semicolon in SQL statements. Thanks to Xypron |
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| 146 | <xypron.glpk@gmx.de>. |
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| 147 | |
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| 148 | * glpk.h, glpapi14.c |
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| 149 | New API routine glp_time was added (not documented yet). |
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| 150 | |
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| 151 | * glpapi20.c |
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| 152 | Two new options were added to glpsol: --seed value (initialize |
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| 153 | pseudo-random number generator used in MathProg model with |
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| 154 | specified seed value), and --ini filename (use as initial basis |
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| 155 | previously saved with -w option). |
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| 156 | |
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| 157 | * examples/xyacfs.mod |
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| 158 | Thanks to Nigel Galloway <nigel_galloway@operamail.com> for |
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| 159 | contribution. |
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| 160 | |
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| 161 | * examples/dbf/*.* |
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| 162 | Thanks to Noli Sicad <nsicad@gmail.com> for contribution. |
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| 163 | |
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| 164 | * w32/*.*, w64/*.* |
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| 165 | Scripts to build GLPK with Microsoft Visual Studio 2010 were |
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| 166 | added. Thanks to Xypron <xypron.glpk@gmx.de> for contribution |
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| 167 | and testing. |
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| 168 | |
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| 169 | Tue Nov 03 12:00:00 2009 Andrew Makhorin <mao@gnu.org> |
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| 170 | |
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| 171 | * GLPK 4.40 (25:0:25) has been released |
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| 172 | |
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| 173 | * glpdmx.c |
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| 174 | Two new API routines were added: |
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| 175 | glp_read_ccdata (read graph in DIMACS clique/coloring format); |
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| 176 | glp_write_ccdata (write graph in DIMACS clique/coloring format). |
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| 177 | Also an example file examples/sample.col was added. |
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| 178 | |
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| 179 | * glpapi19.c, glpnet08.c |
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| 180 | New API routine glp_wclique_exact was added. It is intended to |
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| 181 | find a maximum weight clique with the exact algorithm developed |
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| 182 | by Prof. P. Ostergard. |
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| 183 | |
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| 184 | * glpnpp02.c |
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| 185 | A bug was fixed in the LP preprocessor (routine npp_empty_col). |
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| 186 | Thanks to Stefan Vigerske <stefan@math.hu-berlin.de> for the |
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| 187 | bug report. |
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| 188 | |
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| 189 | * glpios10.c |
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| 190 | A bug was fixed and some improvements were made in the FPUMP |
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| 191 | heuristic module. Thanks to Xypron <xypron.glpk@gmx.de>. |
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| 192 | |
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| 193 | * glpapi12.c |
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| 194 | A bug was fixed in the API routine glp_warm_up (dual |
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| 195 | feasibility test was incorrect in maximization case). Thanks to |
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| 196 | Uday Venkatadri <Uday.Venkatadri@dal.ca> for the bug report. |
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| 197 | |
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| 198 | * glpapi16.c |
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| 199 | Two new API routines were added: |
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| 200 | glp_del_vertices (remove vertices from graph); |
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| 201 | glp_del_arc (remove arc from graph). |
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| 202 | |
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| 203 | * glpios09.c |
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| 204 | The hybrid pseudocost branching heuristic was included in the |
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| 205 | MIP solver. It is available on API level (iocp.br_tech should |
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| 206 | be set to GLP_BR_PCH) and in the stand-alone solver glpsol |
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| 207 | (via the command-line option --pcost). This heuristic may be |
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| 208 | useful on solving hard MIP instances. |
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| 209 | |
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| 210 | * glpios03.c |
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| 211 | The branching heuristic by Driebeck and Tomlin (used in the |
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| 212 | MIP solver by default) was changed to switch to branching on |
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| 213 | most fractional variable if an lower bound of degradation of |
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| 214 | the objective is close to zero for all branching candidates. |
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| 215 | |
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| 216 | Sun Jul 26 12:00:00 2009 Andrew Makhorin <mao@mai2.rcnet.ru> |
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| 217 | |
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| 218 | * GLPK 4.39 (24:0:24) has been released |
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| 219 | |
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| 220 | * glpsdf.c |
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| 221 | New API routines to read plain data files were added. |
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| 222 | |
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| 223 | * glpcpx.h, glpini.h, glpscl.h |
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| 224 | These headers were removed. |
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| 225 | |
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| 226 | * glpcpx.c |
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| 227 | API routines glp_read_lp and glp_write_lp to read/write files |
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| 228 | in CPLEX LP format were re-implemented. Now glp_write_lp |
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| 229 | correctly writes double-bounded (ranged) rows by introducing |
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| 230 | slack variables rather than by duplicating the rows. The data |
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| 231 | structure glp_cpxcp and routine glp_init_cpxcp were added. |
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| 232 | |
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| 233 | * amd/* |
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| 234 | The 'xfree(NULL)' bug was fixed in the AMD routines. Thanks to |
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| 235 | Niels Klitgord <niels@bu.edu> for the bug report. |
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| 236 | |
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| 237 | * glpapi16.c |
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| 238 | New API routines glp_set_vertex_name, glp_create_v_index, |
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| 239 | glp_find_vertex, and glp_delete_v_index were added. |
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| 240 | |
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| 241 | * glpdmx.c |
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| 242 | New API routines glp_read_asnprob, glp_write_asnprob, |
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| 243 | glp_read_ccformat, and glp_write_ccformat were added (the two |
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| 244 | latter routines are not documented yet). |
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| 245 | |
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| 246 | * glpapi18.c |
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| 247 | New API routines glp_check_asnprob, glp_asnprob_lp, |
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| 248 | glp_asnprob_okalg, and glp_asnprob_hall were added. |
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| 249 | |
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| 250 | * glpini01.c, glpini02.c |
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| 251 | The message "Crashing..." was changed to "Constructing initial |
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| 252 | basis..." due to suggestion by Thomas Kahle <tom111@gmx.de>. |
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| 253 | |
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| 254 | * glpapi14.c |
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| 255 | New API routines glp_printf, glp_vprintf, glp_malloc, |
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| 256 | glp_calloc, glp_free, and glp_assert were added. |
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| 257 | |
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| 258 | * glplpp.h, glplpp01.c, glplpp02.c |
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| 259 | Old LP presolver routines were removed. Now glp_simplex uses |
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| 260 | new preprocessing routines (see glpnpp). |
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| 261 | |
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| 262 | * glpapi12.c |
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| 263 | New API routine glp_warm_up was added; it replaces the routine |
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| 264 | lpx_warm_up. |
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| 265 | |
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| 266 | Sat May 02 12:00:00 2009 Andrew Makhorin <mao@mai2.rcnet.ru> |
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| 267 | |
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| 268 | * GLPK 4.38 (23:0:23) has been released |
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| 269 | |
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| 270 | * glpmps.c |
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| 271 | API routines to read/write MPS files were re-implemented. |
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| 272 | |
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| 273 | * glpspx02.c |
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| 274 | Some improvements were made in the dual simplex routine. |
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| 275 | |
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| 276 | * glpk.h |
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| 277 | New structure glp_iptcp was added. |
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| 278 | |
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| 279 | * glpnpp.h, glpnpp01.c, glpnpp02.c |
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| 280 | New LP/MIP preprocessor. Currently it includes only some basic |
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| 281 | routines and used only in the interior-point solver. |
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| 282 | |
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| 283 | * glpapi08.c |
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| 284 | API routine glp_interior was replaced by an improved version |
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| 285 | (new LP/MIP preprocessor, new ordering algorithms). |
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| 286 | |
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| 287 | New API routine glp_init_iptcp was added. |
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| 288 | |
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| 289 | API routine glp_ipt_status may return two new statuses due to |
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| 290 | changes in glp_interior. |
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| 291 | |
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| 292 | * glpsol.c |
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| 293 | New command-line options were added (ordering algorithm used in |
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| 294 | the interior-point solver). |
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| 295 | |
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| 296 | * amd/*.*, colamd/*.* |
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| 297 | Two external software modules AMD and COLAMD/SYMAMD used in the |
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| 298 | interior-point solver were included in the distribution. |
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| 299 | |
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| 300 | For details see amd/README and colamd/README. |
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| 301 | |
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| 302 | * glpnet03.c, glpnet04.c, glpnet05.c |
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| 303 | A minor bug was fixed (_G => G_). Thanks to Nelson H. F. Beebe |
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| 304 | <beebe@math.utah.edu> for bug report. |
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| 305 | |
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| 306 | Sun Mar 29 12:00:00 2009 Andrew Makhorin <mao@mai2.rcnet.ru> |
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| 307 | |
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| 308 | * GLPK 4.37 (22:0:22) has been released |
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| 309 | |
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| 310 | * glpk.h |
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| 311 | iocp.fp_heur was added to enable/disable fpump heuristic. |
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| 312 | |
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| 313 | * glpios10.c |
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| 314 | ios_feas_pump was added (feasibility pump heuristic). |
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| 315 | |
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| 316 | * glpsol.c |
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| 317 | --fpump command-line option was added. |
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| 318 | |
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| 319 | * glpsds.c |
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| 320 | Plain data set routines were added to facilitate reading plain |
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| 321 | data in application programs. Currently these routines are not |
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| 322 | in API, though declared in glpk.h. |
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| 323 | |
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| 324 | * glpapi08.c |
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| 325 | A bug was fixed in the internal routine restore. (Due to this |
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| 326 | bug dual solution components were computed incorrectly if the |
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| 327 | problem was scaled.) |
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| 328 | |
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| 329 | * glpapi10.c, glpapi11.c |
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| 330 | The following new API routines were added: |
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| 331 | glp_print_sol (replaces lpx_print_sol); |
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| 332 | glp_print_ipt (replaces lpx_print_ips); |
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| 333 | glp_print_mip (replaces lpx_print_mip); |
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| 334 | _glp_check_kkt (replaces lpx_check_kkt, lpx_check_int). |
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| 335 | Now the routine lpx_print_prob (deprecated) is equivalent to |
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| 336 | the routine glp_write_lp. |
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| 337 | |
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| 338 | * glpapi18.c, glpapi19.c |
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| 339 | The following new API routines were added: |
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| 340 | glp_read_graph (read graph from plain text file); |
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| 341 | glp_write_graph (write graph to plain text file); |
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| 342 | glp_weak_comp (find all weakly connected components); |
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| 343 | glp_strong_comp (find all strongly connected components). |
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| 344 | |
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| 345 | * configure.ac, Makefile.am |
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| 346 | Changes were made: (a) to allow using autoreconf/autoheader; |
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| 347 | (b) to allow building glpk in a directory other than its source |
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| 348 | directory. Thanks to Marco Atzeri <marco_atzeri@yahoo.it> for |
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| 349 | bug report. |
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| 350 | |
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| 351 | * examples/shiftcover.mod |
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| 352 | An example model in MathProg was added. |
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| 353 | Thanks to Larry D'Agostino <Larry.D'Agostino@gmacrescap.com> |
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| 354 | for contribution. |
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| 355 | |
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| 356 | Fri Feb 06 12:00:00 2009 Andrew Makhorin <mao@mai2.rcnet.ru> |
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| 357 | |
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| 358 | * GLPK 4.36 (21:0:21) has been released |
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| 359 | |
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| 360 | * glpnet06.c, glpnet07.c, glpapi19.c |
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| 361 | The following new API routines were added: |
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| 362 | glp_mincost_okalg find minimum-cost flow with out-of-kilter |
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| 363 | algorithm |
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| 364 | glp_maxflow_ffalg find maximal flow with Ford-Fulkerson |
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| 365 | algorithm |
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| 366 | |
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| 367 | * glpsol.c |
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| 368 | Two new command-line options were added: |
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| 369 | --mincost read min-cost flow data in DIMACS format |
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| 370 | --maxflow read maximum flow data in DIMACS format |
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| 371 | |
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| 372 | * doc/glpk.* |
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| 373 | New edition of the reference manual was included. |
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| 374 | |
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| 375 | * glpk.h |
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| 376 | Duplicate symbols were removed to allow using swig. |
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| 377 | Thanks to Kelly Westbrooks <kellywestbrooks@yahoo.com> and |
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| 378 | Nigel Galloway <nigel_galloway@operamail.com> for suggestion. |
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| 379 | |
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| 380 | * glpcpx.c |
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| 381 | A minor defect was fixed in the routine glp_write_lp. |
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| 382 | Thanks to Sebastien Briais <sbriais@free.fr> for bug report. |
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| 383 | |
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| 384 | * glpsql.c |
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| 385 | A minor bug was fixed. Thanks to Xypron <xypron.glpk@gmx.de> |
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| 386 | for patch. |
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| 387 | |
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| 388 | * examples/hashi.mod, examples/shikaku.mod |
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| 389 | Two example models in MathProg were added. Thanks to Sebastian |
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| 390 | Nowozin <nowozin@gmail.com> for contribution. |
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| 391 | |
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| 392 | * examples/qfit.mod, examples/yacfs.mod |
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| 393 | Two example models in MathProg were added. Thanks to Nigel |
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| 394 | Galloway <nigel_galloway@operamail.com> for contribution. |
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| 395 | |
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| 396 | Fri Jan 09 12:00:00 2009 Andrew Makhorin <mao@mai2.rcnet.ru> |
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| 397 | |
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| 398 | * GLPK 4.35 (20:0:20) has been released |
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| 399 | |
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| 400 | * glpk.h, glpapi.c, glpnet.c |
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| 401 | The following new API routines were added: |
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| 402 | glp_create_graph create graph |
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| 403 | glp_set_graph_name assign (change) graph name |
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| 404 | glp_add_vertices add new vertices to graph |
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| 405 | glp_add_arc add new arc to graph |
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| 406 | glp_erase_graph erase graph content |
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| 407 | glp_delete_graph delete graph |
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| 408 | glp_read_mincost read minimum cost flow problem data in |
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| 409 | DIMACS format |
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| 410 | glp_write_mincost write minimum cost flow problem data in |
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| 411 | DIMACS format |
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| 412 | glp_mincost_lp convert minimum cost flow problem to LP |
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| 413 | glp_netgen Klingman's network problem generator |
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| 414 | glp_gridgen grid-like network problem generator |
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| 415 | glp_read_maxflow read maximum flow problem data in DIMACS |
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| 416 | format |
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| 417 | glp_write_maxflow write maximum flow problem data in DIMACS |
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| 418 | format |
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| 419 | glp_maxflow_lp convert maximum flow problem to LP |
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| 420 | glp_rmfgen Goldfarb's maximum flow problem generator |
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| 421 | |
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| 422 | * doc/glpk.* |
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| 423 | New edition of the reference manual was included. |
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| 424 | |
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| 425 | * examples/sample.min, examples/sample.max |
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| 426 | Two example data files in DIMACS format were added. |
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| 427 | |
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| 428 | * glplib04.c |
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| 429 | The statement "if (c = '\n') fflush(stdout)" was added to the |
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| 430 | internal routine xputc to provide "real-time" terminal output. |
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| 431 | Thanks to Luiz Bettoni <bettoni@cpgei.ct.utfpr.edu.br> for |
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| 432 | suggestion. |
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| 433 | |
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| 434 | * glpmpl05.c |
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| 435 | A minor bug was fixed in the internal routine mpl_fn_time2str. |
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| 436 | Thanks to Stefan Vigerske <stefan@vigerske.de> for bug report. |
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| 437 | |
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| 438 | * w32/makefile, w64/makefile |
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| 439 | The flag -O2 (/O2) was added to some makefiles. |
---|
| 440 | |
---|
| 441 | Thu Dec 04 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 442 | |
---|
| 443 | * GLPK 4.34 (19:0:19) has been released |
---|
| 444 | |
---|
| 445 | * src/glpios03.c |
---|
| 446 | A bug was fixed in the internal routine branch_on. Thanks to |
---|
| 447 | Nigel Galloway <nigel_galloway@operamail.com> for bug report. |
---|
| 448 | |
---|
| 449 | * src/glpmpl05.c |
---|
| 450 | Three new MathProg functions were included: |
---|
| 451 | gmtime obtaining current calendar time |
---|
| 452 | str2time converting character string to calendar time |
---|
| 453 | time2str converting calendar time to character string |
---|
| 454 | Thanks to Xypron <xypron.glpk@gmx.de>. |
---|
| 455 | |
---|
| 456 | * doc/glpk.*, doc/gmpl.* |
---|
| 457 | A new edition of the GLPK reference manual and GNU MathProg |
---|
| 458 | language description were included. |
---|
| 459 | |
---|
| 460 | Thu Oct 30 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 461 | |
---|
| 462 | * GLPK 4.33 (18:0:18) has been released |
---|
| 463 | |
---|
| 464 | * glpapi*.* |
---|
| 465 | The following new API routines were added: |
---|
| 466 | glp_copy_prob copy problem object content |
---|
| 467 | glp_exact solve LP in exact arithmetic |
---|
| 468 | (makes lpx_exact deprecated) |
---|
| 469 | glp_get_unbnd_ray determine variable causing unboundedness |
---|
| 470 | (makes lpx_get_ray_info deprecated) |
---|
| 471 | glp_interior solve LP with interior-point method |
---|
| 472 | (makes lpx_interior deprecated) |
---|
| 473 | |
---|
| 474 | * glpapi*.* |
---|
| 475 | The following new API routines for processing models written in |
---|
| 476 | the GNU Mathprog language were added to the package: |
---|
| 477 | glp_mpl_alloc_wksp allocate the translator workspace |
---|
| 478 | glp_mpl_read_model read and translate model section |
---|
| 479 | glp_mpl_read_data read and translate data section |
---|
| 480 | glp_mpl_generate generate the model |
---|
| 481 | glp_mpl_build_prob build LP/MIP instance from the model |
---|
| 482 | glp_mpl_postsolve postsolve the model |
---|
| 483 | glp_mpl_free_wksp deallocate the translator workspace |
---|
| 484 | (These routines make lpx_read_model deprecated.) |
---|
| 485 | |
---|
| 486 | * src/glpapi17.c, examples/glpsol.c |
---|
| 487 | The stand-alone solver glpsol was re-implemented with new API |
---|
| 488 | routines. |
---|
| 489 | |
---|
| 490 | * src/glpsql.c |
---|
| 491 | Some bugs were fixed in the SQL table driver. Thanks to Xypron |
---|
| 492 | <xypron.glpk@gmx.de>. |
---|
| 493 | |
---|
| 494 | * examples/cplex/*.* |
---|
| 495 | A crude implementation of CPLEX-like interface to GLPK API was |
---|
| 496 | added to the package. See examples/cplex/README. |
---|
| 497 | |
---|
| 498 | Fri Oct 03 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 499 | |
---|
| 500 | * GLPK 4.32 (17:0:17) has been released |
---|
| 501 | |
---|
| 502 | * glpmpl01.c |
---|
| 503 | A bug was fixed. Due to this bug iterated expressions having |
---|
| 504 | an indexing expression whose dummy indices are bound to some |
---|
| 505 | values, i.e. like sum{(i+1,j,k-1) in E} x[i,j,k] are evaluated |
---|
| 506 | incorrectly. Namely, current value of such expressions is not |
---|
| 507 | invalidated when corresponding dummy indices (like i and k in |
---|
| 508 | the example above) are changed, that erroneously results in the |
---|
| 509 | same value evaluated for the first time. |
---|
| 510 | |
---|
| 511 | * glpios03.c |
---|
| 512 | Euclidean reduction of the local objective bound was added in |
---|
| 513 | the routine glpios03.c. |
---|
| 514 | |
---|
| 515 | * glpapi11.c |
---|
| 516 | The following new branch-and-cut API routines were added: |
---|
| 517 | glp_ios_row_attr determine additional row attributes; |
---|
| 518 | glp_ios_pool_size determine current size of the cut pool; |
---|
| 519 | glp_ios_add_row add constraint to the cut pool; |
---|
| 520 | glp_ios_del_row delete constraint from the cut pool; |
---|
| 521 | glp_ios_clear_pool delete all constraints from the cut pool. |
---|
| 522 | |
---|
| 523 | * glpapi08.c |
---|
| 524 | The following new features were included in the branch-and-cut |
---|
| 525 | solver (the API routine glp_intopt): |
---|
| 526 | MIP presolver; |
---|
| 527 | mixed cover cut generator; |
---|
| 528 | clique cut generator. |
---|
| 529 | Due to the MIP presolver glp_intopt may additionally return |
---|
| 530 | GLP_ENOPFS and GLP_ENODFS, if primal or dual infeasibility of |
---|
| 531 | LP relaxation is detected by the presolver. Also the return |
---|
| 532 | code GLP_EMIPGAP was introduced to correctly indicate that the |
---|
| 533 | mip gap tolerance is reached. |
---|
| 534 | |
---|
| 535 | * glplpx01.c |
---|
| 536 | Now the obsolete API routines lpx_integer and lpx_intopt are |
---|
| 537 | completely superseded by the API routine glp_intopt that makes |
---|
| 538 | them deprecated. |
---|
| 539 | |
---|
| 540 | * glpmpl05.c |
---|
| 541 | Now the table driver name "iODBC" can be specified as "ODBC". |
---|
| 542 | |
---|
| 543 | * glpmpl03.c |
---|
| 544 | A bug fixed in the routine free_dca. |
---|
| 545 | Thanks to Xypron <xypron.glpk@gmx.de>. |
---|
| 546 | |
---|
| 547 | * glpsql.c |
---|
| 548 | A bug was fixed in the SQL table driver. |
---|
| 549 | Thanks to Xypron <xypron.glpk@gmx.de>. |
---|
| 550 | |
---|
| 551 | * examples/glpsol.c |
---|
| 552 | Changes were made to allow multiple MathProg data files. |
---|
| 553 | |
---|
| 554 | * doc/glpk.* |
---|
| 555 | A new edition of the GLPK reference manual was included. |
---|
| 556 | |
---|
| 557 | * doc/tables.* |
---|
| 558 | A new edition of the supplement "Using data tables in the GNU |
---|
| 559 | MathProg language" was included. |
---|
| 560 | |
---|
| 561 | Tue Sep 02 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 562 | |
---|
| 563 | * GLPK 4.31 (16:0:16) has been released |
---|
| 564 | |
---|
| 565 | * glpspx.h, glpspx01.c, glpspx02.c, glpapi06.c |
---|
| 566 | The dual simplex solver (spx_dual_opt) was replaced by a new |
---|
| 567 | implementation of the two-phase dual simplex method (spx_dual). |
---|
| 568 | Old simplex method routines (spx_prim_opt, spx_prim_feas, and |
---|
| 569 | spx_dual_opt) were removed from the package. |
---|
| 570 | |
---|
| 571 | * glpk.h, glpscl.h, glpscl.c, glpapi04.c |
---|
| 572 | New API routine glp_scale_prob was added. It replaces routine |
---|
| 573 | lpx_scale_prob which is deprecated. |
---|
| 574 | |
---|
| 575 | * glpk.h, glpini.h, glpini01.c, glpini02.c, glpapi05.c |
---|
| 576 | New API routines glp_std_basis, glp_adv_basis, glp_cpx_basis |
---|
| 577 | were added. They replace routines lpx_std_basis, lpx_adv_basis, |
---|
| 578 | lpx_cpx_basis which are deprecated. |
---|
| 579 | |
---|
| 580 | * glpdmp.c |
---|
| 581 | 8-byte data alignment was added to the module (sufficient for |
---|
| 582 | both ILP32 and LP64 environments). |
---|
| 583 | |
---|
| 584 | * glplib07.c |
---|
| 585 | 16-byte data alignment was added to the module to provide |
---|
| 586 | compatibility with LP64 environment (8-byte is not sufficient |
---|
| 587 | due to jmp_buf; thanks to Xypron for investigation). |
---|
| 588 | |
---|
| 589 | * glplpx16.c |
---|
| 590 | New version of the routine lpx_write_pb was added. Thanks to |
---|
| 591 | Oscar Gustafsson <oscarg@isy.liu.se> for the contribution. |
---|
| 592 | |
---|
| 593 | * w32/VC9, w64/VC9 |
---|
| 594 | Makefiles and batch files were added to build GLPK under 32- |
---|
| 595 | and 64-bit Windows with Microsoft Visual Studio Express 2008. |
---|
| 596 | Thanks to Heinrich Schuchardt <heinrich.schuchardt@gmx.de> for |
---|
| 597 | the contribution and testing. |
---|
| 598 | |
---|
| 599 | * w32/DM, w32/OWC |
---|
| 600 | Makefiles and batch files were added to build GLPK with Digital |
---|
| 601 | Mars C/C++ 8.50 and Open Watcom C/C++ 1.6 (32-bit Windows). |
---|
| 602 | |
---|
| 603 | Wed Aug 13 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 604 | |
---|
| 605 | * GLPK 4.30 (15:0:15) has been released |
---|
| 606 | |
---|
| 607 | * glpspx.h, glpspx03.c, glpapi06.c |
---|
| 608 | The primal simplex solver (spx_prim_opt, spx_prim_feas) was |
---|
| 609 | replaced by a new implementation (spx_primal), which currently |
---|
| 610 | provides the same features as the old version. |
---|
| 611 | |
---|
| 612 | * glpmpl01.c, glpmpl03.c |
---|
| 613 | Some changes were made in the MathProg translator to allow <, |
---|
| 614 | <=, >=, and > on comparing symbolic values. Thanks to Heinrich |
---|
| 615 | Schuchardt <heinrich.schuchardt@gmx.de> for patches. |
---|
| 616 | |
---|
| 617 | * glplpx10.c |
---|
| 618 | Internal routine set_d_eps in the exact LP solver was changed |
---|
| 619 | to prevent approximation errors in case of integral data. |
---|
| 620 | Thanks to Markus Pilz <pilz@cs.uni-bonn.de> for bug report. |
---|
| 621 | |
---|
| 622 | XXX XXX XX 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 623 | |
---|
| 624 | * GLPK 4.29 (14:0:14) has been released |
---|
| 625 | |
---|
| 626 | * configure.ac |
---|
| 627 | The configure script was changed to disable optional features |
---|
| 628 | by default. For details see file INSTALL. |
---|
| 629 | |
---|
| 630 | * glpipp02.c |
---|
| 631 | A bug was fixed in the internal routine reduce_bounds. Thanks |
---|
| 632 | to Anne-Laurence Putz <anne-laurence.putz@eurodecision.com> for |
---|
| 633 | the bug report. |
---|
| 634 | |
---|
| 635 | * glpapi01.c |
---|
| 636 | New API routine glp_erase_prob was added. |
---|
| 637 | |
---|
| 638 | * glpapi13.c |
---|
| 639 | New API routines glp_read_mps and glp_write_mps were added. |
---|
| 640 | They replace API routines lpx_read_mps, lpx_read_freemps, |
---|
| 641 | lpx_write_mps, and lpx_write_freemps, which are deprecated. |
---|
| 642 | |
---|
| 643 | * glpapi14.c |
---|
| 644 | New API routines glp_read_lp and glp_write_lp were added. They |
---|
| 645 | replace API routines lpx_read_cpxlp and lpx_write_cpxlp, which |
---|
| 646 | are deprecated. |
---|
| 647 | |
---|
| 648 | * glpsql.c |
---|
| 649 | Minor bug was fixed. Thanks to Xypron <xypron.glpk@gmx.de> for |
---|
| 650 | the bug report. |
---|
| 651 | |
---|
| 652 | Tue Mar 25 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 653 | |
---|
| 654 | * GLPK 4.28 (13:0:13) has been released |
---|
| 655 | |
---|
| 656 | * glplib.h, glplib.c |
---|
| 657 | Three wrapper routines xdlopen, xdlsym, and xdlclose, which |
---|
| 658 | provide the shared library support, were added. A particular |
---|
| 659 | version of these routines depends on the option --enable-dl |
---|
| 660 | passed to the configure script (see file INSTALL for details). |
---|
| 661 | Thanks to Rafael Laboissiere <rafael@debian.org> for useful |
---|
| 662 | advices concerning the shared library support. |
---|
| 663 | |
---|
| 664 | * glpsql.c |
---|
| 665 | A static linking to iODBC and MySQL libraries used in the |
---|
| 666 | MathProg table drivers was replaced by a dynamic linking to |
---|
| 667 | corresponding shared libraries. |
---|
| 668 | Many thanks to Heinrich Schuchardt <heinrich.schuchardt@gmx.de> |
---|
| 669 | for the contribution and to Vijay Patil <vijay.patil@gmail.com> |
---|
| 670 | for testing this feature under Windows XP. |
---|
| 671 | |
---|
| 672 | * glpgmp.h, glpgmp.c |
---|
| 673 | A bug (which appeared only on 64-bit platforms) was fixed. |
---|
| 674 | Thanks to Axel Simon <Axel.Simon@ens.fr> for the bug report. |
---|
| 675 | |
---|
| 676 | * glpapi.c |
---|
| 677 | A bug was fixed in the api routine glp_add_cols. (If the basis |
---|
| 678 | is valid, adding column keeps it valid, however, col->bind was |
---|
| 679 | set to -1 rather to 0.) |
---|
| 680 | Thanks to Cedric[FR] <fox2113@wanadoo.fr> for the bug report. |
---|
| 681 | |
---|
| 682 | * glplib.c |
---|
| 683 | 64-bit unsigned int type glp_ulong and corresponding routines |
---|
| 684 | were replaced by 64-bit signed int type xlong_t. |
---|
| 685 | |
---|
| 686 | * glpk.h, glpapi.c |
---|
| 687 | The type glp_ulong was replaced by glp_long. This affects only |
---|
| 688 | the api routine glp_mem_usage. |
---|
| 689 | |
---|
| 690 | * glplib.c |
---|
| 691 | Compressed data file support was added. This feature requires |
---|
| 692 | the zlib data compression libraries and allows compressing and |
---|
| 693 | decompressing .gz files "on the fly". |
---|
| 694 | |
---|
| 695 | * glpcli.h, glpcli.c |
---|
| 696 | Command-line interface routines were added. (This feature is |
---|
| 697 | incomplete so far.) |
---|
| 698 | |
---|
| 699 | Sun Mar 02 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 700 | |
---|
| 701 | * GLPK 4.27 (12:0:12) has been released |
---|
| 702 | |
---|
| 703 | * glpsql.h, glpsql.c |
---|
| 704 | Two MathProg table drivers for iODBC and MySQL contributed by |
---|
| 705 | Heinrich Schuchardt <heinrich.schuchardt@gmx.de> were added to |
---|
| 706 | the package. |
---|
| 707 | |
---|
| 708 | * glpmpl05.c |
---|
| 709 | Mathprog table driver for xBASE was added to the package. |
---|
| 710 | |
---|
| 711 | * glpmpl03.c |
---|
| 712 | A minor was fixed in the MathProg translator (if some field |
---|
| 713 | specified in the table statement is missing in corresponding |
---|
| 714 | input table, the bug causes abnormal termination). Thanks to |
---|
| 715 | Heinrich Schuchardt <heinrich.schuchardt@gmx.de> for the bug |
---|
| 716 | report. |
---|
| 717 | |
---|
| 718 | * glpmpl.h, glpmpl.c |
---|
| 719 | STRING data type was replaced by plain character strings. |
---|
| 720 | |
---|
| 721 | Sun Feb 17 12:00:00 2008 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 722 | |
---|
| 723 | * GLPK 4.26 (11:0:11) has been released |
---|
| 724 | |
---|
| 725 | * glpmpl.h, glpmpl01.c, glpmpl03.c, glpmpl05.c |
---|
| 726 | The table statement was implemented. Description of this new |
---|
| 727 | feature is given in file doc/tables.txt. |
---|
| 728 | |
---|
| 729 | * glpios03.c |
---|
| 730 | A bug causing zero divide error on computing euclidean norm of |
---|
| 731 | the cut coefficient vector was fixed. |
---|
| 732 | |
---|
| 733 | Wed Dec 19 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 734 | |
---|
| 735 | * GLPK 4.25 (10:0:10) has been released |
---|
| 736 | |
---|
| 737 | * glpapi10.c |
---|
| 738 | Routines lpx_eval_tab_row and lpx_eval_tab_col were replaced by |
---|
| 739 | glp_eval_tab_row and glp_eval_tab_col. |
---|
| 740 | |
---|
| 741 | * glpios03.c, glpios05.c |
---|
| 742 | Gomory's mixed integer cuts were implemented. |
---|
| 743 | |
---|
| 744 | * glpscs.h, glpscs.c |
---|
| 745 | Segmented character string routines are no longer used and were |
---|
| 746 | removed from the package. |
---|
| 747 | |
---|
| 748 | Wed Nov 21 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 749 | |
---|
| 750 | * GLPK 4.24 (9:0:9) has been released |
---|
| 751 | |
---|
| 752 | * src/glplpx16.c |
---|
| 753 | A bug was fixed in the routine lpx_write_cpxlp. If a variable |
---|
| 754 | x has upper bound and no lower bound, it should appear in the |
---|
| 755 | bounds section as "-inf <= x <= u", not as "x <= u". Thanks to |
---|
| 756 | Enric Rodriguez <erodri@lsi.upc.edu> for the bug report. |
---|
| 757 | |
---|
| 758 | * src/glpios03.c, src/glpios04.c, src/glpios05.c |
---|
| 759 | MIR (mixed integer rounding) cuts were implemented. |
---|
| 760 | |
---|
| 761 | Sun Oct 28 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 762 | |
---|
| 763 | * GLPK 4.23 (8:0:8) has been released |
---|
| 764 | |
---|
| 765 | * src/glplib05.c, configure.ac |
---|
| 766 | Check for vsnprintf was added. |
---|
| 767 | |
---|
| 768 | * include/glppds.h, src/glppds.c |
---|
| 769 | A module to scan plain data was added. |
---|
| 770 | |
---|
| 771 | * src/glpapi09.c |
---|
| 772 | The following new API routines were added: |
---|
| 773 | glp_read_sol read basic solution from text file; |
---|
| 774 | glp_write_sol write basic solution to text file; |
---|
| 775 | glp_read_ipt read interior-point solution from text file; |
---|
| 776 | glp_write_ipt write interior-point solution to text file; |
---|
| 777 | glp_read_mip read MIP solution from text file; |
---|
| 778 | glp_write_mip write MIP solution to text file. |
---|
| 779 | |
---|
| 780 | * src/glpapi12.c |
---|
| 781 | Advanced API routine glp_free_env was added. |
---|
| 782 | |
---|
| 783 | * examples/glpsol.c |
---|
| 784 | The following three command-line options were added: |
---|
| 785 | --mipgap tol set relative MIP gap tolerance |
---|
| 786 | -r filename read solution from filename |
---|
| 787 | -w filename write solution to filename |
---|
| 788 | |
---|
| 789 | Wed Sep 19 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 790 | |
---|
| 791 | * GLPK 4.22 (7:0:7) has been released |
---|
| 792 | |
---|
| 793 | * src/glpios02.c |
---|
| 794 | A bug was fixed in the MIP preprocessor (ios_preprocess_node). |
---|
| 795 | Thanks to Roberto Bagnara <bagnara@cs.unipr.it> (Department of |
---|
| 796 | Mathematics, University of Parma, Italy) for the bug report. |
---|
| 797 | |
---|
| 798 | * src/glpios02.c |
---|
| 799 | A bug was fixed in the MIP preprocessor (col_implied_bounds), |
---|
| 800 | due to which constraint coefficients with small magnitude could |
---|
| 801 | lead to wrong implied bounds of structural variables. |
---|
| 802 | |
---|
| 803 | * src/glpipp02.c |
---|
| 804 | A similar bug was fixed in the routine reduce_bounds. |
---|
| 805 | |
---|
| 806 | * src/glpapi01.c |
---|
| 807 | A bug was fixed in the routines glp_set_mat_row and |
---|
| 808 | glp_set_mat_col. (The bug appeared due to incorrect removing |
---|
| 809 | zero elements from the row/column lists.) |
---|
| 810 | |
---|
| 811 | * src/glplpx14.c |
---|
| 812 | A bug was fixed in the API routines lpx_read_mps and |
---|
| 813 | lpx_read_freemps, due to which bounds of type LI specified in |
---|
| 814 | BOUNDS section were incorrectly processed. |
---|
| 815 | |
---|
| 816 | * src/glplib05.c |
---|
| 817 | A call to standard function vsprintf was replaced by a call to |
---|
| 818 | vsnprintf for security reasons. Many thanks to Peter T. Breuer |
---|
| 819 | <ptb@inv.it.uc3m.es> and Rafael Laboissiere <rafael@debian.org>. |
---|
| 820 | |
---|
| 821 | Tue Aug 28 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 822 | |
---|
| 823 | * GLPK 4.21 (6:0:6) has been released |
---|
| 824 | |
---|
| 825 | * glpscg.h, glpscg.c |
---|
| 826 | Routines to maintain sparse cliqued graph were added. |
---|
| 827 | |
---|
| 828 | * glpios02.c |
---|
| 829 | MIP preprocessing routines were added. |
---|
| 830 | |
---|
| 831 | * glpk.h, glpios.h, glpios03.c |
---|
| 832 | New reasons for calling the callback routine were introduced |
---|
| 833 | in the MIP solver. |
---|
| 834 | |
---|
| 835 | * glpapi08.c |
---|
| 836 | Default backtracking strategy was changed to best local bound. |
---|
| 837 | |
---|
| 838 | * glpapi11.c |
---|
| 839 | New API routine glp_term_out to enable/disable terminal output |
---|
| 840 | was added. |
---|
| 841 | |
---|
| 842 | * glprng.h, glprng02.c |
---|
| 843 | Two routines to generate uniformly distributed pseudo-random |
---|
| 844 | floating-point numbers were added. |
---|
| 845 | |
---|
| 846 | Thu Jul 26 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 847 | |
---|
| 848 | * GLPK 4.20 (5:0:5) has been released |
---|
| 849 | |
---|
| 850 | * glpk.h, glpapi08.c |
---|
| 851 | The routine lpx_integer was replaced by an equivalent routine |
---|
| 852 | glp_intopt. Also new API routine glp_init_iocp was added. |
---|
| 853 | |
---|
| 854 | * glpiet.h, glpiet.c |
---|
| 855 | Routines implementing the implicit enumeration tree are |
---|
| 856 | no longer used and therefore were removed from the package. |
---|
| 857 | |
---|
| 858 | * glpios.h, glpios01.c, glpios02, glpios03 |
---|
| 859 | Routines implementing the integer optimization suite being |
---|
| 860 | replaced by a new version were removed from the package. |
---|
| 861 | |
---|
| 862 | * glpmip.h, glpmip01.c, glpmip02.c |
---|
| 863 | |
---|
| 864 | Routines implementing the B&B method being replaced by a new |
---|
| 865 | version were removed from the package. |
---|
| 866 | |
---|
| 867 | * glpios.h, glpios01.c, glpios02.c |
---|
| 868 | |
---|
| 869 | Routines implementing a new version of the integer optimization |
---|
| 870 | suite (IOS) based on the B&B method were added to the package. |
---|
| 871 | |
---|
| 872 | * glpk.h, glpapi10.c |
---|
| 873 | Branch-and-bound interface routines were added to the package. |
---|
| 874 | |
---|
| 875 | * examples/tspsol.c |
---|
| 876 | The TSP solver based on old version of the integer optimization |
---|
| 877 | suite is no more supported and was removed from the package. |
---|
| 878 | |
---|
| 879 | * glpipp02.c |
---|
| 880 | An error in the routine reduce_bounds was fixed; thanks to |
---|
| 881 | Graham Rockwell <bionomicron@gmail.com> for the bug report. |
---|
| 882 | |
---|
| 883 | * glpk.latex |
---|
| 884 | A new edition of the reference manual was included. |
---|
| 885 | |
---|
| 886 | Thu Jul 05 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 887 | |
---|
| 888 | * GLPK 4.19 (4:0:4) has been released |
---|
| 889 | |
---|
| 890 | The principal change is upgrading to GPLv3. |
---|
| 891 | |
---|
| 892 | * glpapi01.c |
---|
| 893 | A serious bug in the routine glp_del_cols was fixed; thanks to |
---|
| 894 | Cedric[FR] <fox2113@wanadoo.fr> for the bug report. The bug |
---|
| 895 | appeared because on deleting non-basic columns the basis header |
---|
| 896 | remained valid, however, contained invalid (old) column ordinal |
---|
| 897 | numbers. |
---|
| 898 | |
---|
| 899 | * glpapi10.c |
---|
| 900 | A new advanced API routine glp_mem_limit was added. |
---|
| 901 | |
---|
| 902 | * glplpx01.c |
---|
| 903 | The case GLP_EBOUND was added to the routine lpx_simplex. |
---|
| 904 | Thanks to Cameron Kellough <Cameron.Kellough@sri.com> for the |
---|
| 905 | bug report. |
---|
| 906 | |
---|
| 907 | * glplpx19.c |
---|
| 908 | An API routine lpx_write_pb to write the problem instance in |
---|
| 909 | OPB (pseudo boolean) format format was added. Thanks to Oscar |
---|
| 910 | Gustafsson <oscarg@isy.liu.se> for the contribution. |
---|
| 911 | |
---|
| 912 | * glpsol.c |
---|
| 913 | Two new options --wpb and --wnpb were added to glpsol to write |
---|
| 914 | the problem instance in OPB format. |
---|
| 915 | |
---|
| 916 | Mon Jun 25 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 917 | |
---|
| 918 | * GLPK 4.18 (3:0:3) has been released |
---|
| 919 | |
---|
| 920 | * glplib.h |
---|
| 921 | Type names ulong_t and uldiv_t were changed to glp_ulong and |
---|
| 922 | glp_uldiv to avoid conflicts with standard type names on some |
---|
| 923 | platforms. Thanks to Boris Wirtz <Boris.Wirtz@uni-oldenburg.de> |
---|
| 924 | for the bug report. |
---|
| 925 | |
---|
| 926 | * glpbfd.*, glpfhv.*, glplpf.* |
---|
| 927 | LP basis factorization routines were made tidy. |
---|
| 928 | |
---|
| 929 | * glpk.h, glpapi04.c |
---|
| 930 | The following API routines were added: |
---|
| 931 | glp_set_rii, glp_set_sjj, glp_get_rii, glp_get_sjj. |
---|
| 932 | |
---|
| 933 | * glpk.h, glpapi06.c |
---|
| 934 | The routine lpx_simplex was replaced by an equivalent routine |
---|
| 935 | glp_simplex. Also new API routine glp_init_smcp was added. |
---|
| 936 | |
---|
| 937 | * glpk.h, glpapi09.c |
---|
| 938 | The following advanced API routines were added: |
---|
| 939 | glp_bf_exists, glp_factorize, glp_bf_updated, glp_get_bfcp, |
---|
| 940 | glp_set_bfcp, glp_get_bhead, glp_get_row_bind, glp_get_col_bind, |
---|
| 941 | glp_ftran, glp_btran. |
---|
| 942 | |
---|
| 943 | * glpk.latex |
---|
| 944 | A new edition of the reference manual was included. |
---|
| 945 | |
---|
| 946 | * examples/dea.mod, examples/food.mod, examples/food2.mod |
---|
| 947 | Three examples in the MathProg language were added. |
---|
| 948 | Thanks to Sebastian Nowozin <nowozin@gmail.com>. |
---|
| 949 | |
---|
| 950 | Sat May 26 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 951 | |
---|
| 952 | * GLPK 4.17 (2:0:2) has been released |
---|
| 953 | |
---|
| 954 | * glpdmp.h, glpdmp.c |
---|
| 955 | Memory pool routines were replaced by a new version. |
---|
| 956 | |
---|
| 957 | * glpscs.h, glpscs.c |
---|
| 958 | Segmented string routines were replaced by a new version. |
---|
| 959 | |
---|
| 960 | * glplpx08.c, glplpx09.c |
---|
| 961 | Now the MIP problem may have no integer columns. |
---|
| 962 | |
---|
| 963 | * glpapi01.c |
---|
| 964 | The routines glp_set_mat_row, glp_set_mat_col, and glp_load_mat |
---|
| 965 | were modified to allow zero elements (which are not stored in |
---|
| 966 | the constraint matrix). |
---|
| 967 | |
---|
| 968 | * glpscf.h, glpscf.c |
---|
| 969 | Schur complement factorization routines were implemented. |
---|
| 970 | |
---|
| 971 | * glplpf.h, glplpf.c |
---|
| 972 | LP basis factorization routines based on LU-factorization and |
---|
| 973 | Schur complement were implemented. |
---|
| 974 | |
---|
| 975 | * glplpx02.c, glplpx03.c |
---|
| 976 | New control parameter LPX_K_BFTYPE was introduced to choose the |
---|
| 977 | basis factorization type used by the simplex method routines. |
---|
| 978 | |
---|
| 979 | * glpsol.c |
---|
| 980 | Three new command-line options were added to choose the basis |
---|
| 981 | factorization type used by the simplex method routines: --luf, |
---|
| 982 | --cbg, and --cgr. |
---|
| 983 | |
---|
| 984 | * glpk.latex |
---|
| 985 | A new edition of the reference manual was included. |
---|
| 986 | |
---|
| 987 | Sat May 05 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 988 | |
---|
| 989 | * GLPK 4.16 (1:0:1) has been released |
---|
| 990 | |
---|
| 991 | * glpk.h, glpapi.c, glplpx01.c, glplpx02.c |
---|
| 992 | Names of a number basic api routines were changed and now have |
---|
| 993 | the prefix 'glp_'. To keep backward compatibility these routines |
---|
| 994 | are also available via their old names prefixed with 'lpx_'. |
---|
| 995 | |
---|
| 996 | * glplpx19.c |
---|
| 997 | Three new api routines were added: glp_version, glp_term_hook, |
---|
| 998 | and glp_mem_usage. |
---|
| 999 | |
---|
| 1000 | * glpk.latex, gmpl.texi |
---|
| 1001 | A new edition of the reference manuals was included. |
---|
| 1002 | |
---|
| 1003 | * lpglpk40.c |
---|
| 1004 | This example program is no longer supported and therefore was |
---|
| 1005 | removed from the package. |
---|
| 1006 | |
---|
| 1007 | Sun Feb 18 12:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1008 | |
---|
| 1009 | * GLPK 4.15 (0:0:0) has been released |
---|
| 1010 | |
---|
| 1011 | * configure.ac, Makefile.am |
---|
| 1012 | Autotools specification files were changed to use GNU Libtool |
---|
| 1013 | that allows building the static as well as shared GLPK library. |
---|
| 1014 | Thanks to Rafael Laboissiere <rafael@debian.org>. |
---|
| 1015 | |
---|
| 1016 | Mon Feb 05 08:00:00 2007 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1017 | |
---|
| 1018 | * GLPK 4.14 has been released |
---|
| 1019 | Now GLPK conforms to ILP32, LLP64, and LP64 programming models |
---|
| 1020 | (the latter seems to be the ultimate choice regarding 64-bit |
---|
| 1021 | architectures). Note that GLPK itself is a 32-bit application, |
---|
| 1022 | and the conformity only means that the package works correctly |
---|
| 1023 | on all these arenae. Nevertheless, on 64-bit platforms it is |
---|
| 1024 | possible to use more than 4GB of memory, if necessary. |
---|
| 1025 | |
---|
| 1026 | * Makefile |
---|
| 1027 | Starting from this release only the header glpk.h is needed to |
---|
| 1028 | be installed. |
---|
| 1029 | |
---|
| 1030 | * glplib01.c |
---|
| 1031 | Two routines bigmul and bigdiv which performs multiplication |
---|
| 1032 | and division of unsigned integers of arbitrary precision were |
---|
| 1033 | added. |
---|
| 1034 | |
---|
| 1035 | * glplib02.c |
---|
| 1036 | A set of 64-bit arithmetic routines were added. |
---|
| 1037 | |
---|
| 1038 | * glplib04.c |
---|
| 1039 | Some low-level library routines were improved and renamed. |
---|
| 1040 | |
---|
| 1041 | * glpcfg.h |
---|
| 1042 | The macro GLP_TM_SPEC were introduced to specify a version of |
---|
| 1043 | the time routine depending on the host environment. |
---|
| 1044 | |
---|
| 1045 | Mon Nov 13 12:00:00 2006 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1046 | |
---|
| 1047 | * GLPK 4.13 has been released |
---|
| 1048 | |
---|
| 1049 | * configure.in |
---|
| 1050 | '-lm' bug was fixed. |
---|
| 1051 | |
---|
| 1052 | * glpbfx.h, glpbfx.c |
---|
| 1053 | Basis factorization interface routines based on exact (bignum) |
---|
| 1054 | arithmetic were implemented. |
---|
| 1055 | |
---|
| 1056 | * glpssx.h, glpssx1.c, glpssx2.c |
---|
| 1057 | Simplex method routines based on exact (bignum) arithmetic were |
---|
| 1058 | implemented. |
---|
| 1059 | |
---|
| 1060 | * glplpx6e.c |
---|
| 1061 | The routine lpx_exact, which is an easy-to-use driver to the |
---|
| 1062 | exact simplex method, was added. |
---|
| 1063 | |
---|
| 1064 | * glpsol.c |
---|
| 1065 | Two command-line options were added: '--exact' and '--xcheck'. |
---|
| 1066 | |
---|
| 1067 | Wed Nov 08 12:00:00 2006 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1068 | |
---|
| 1069 | * GLPK 4.12 has been released |
---|
| 1070 | |
---|
| 1071 | * glpcfg.h |
---|
| 1072 | The package configuration file was added. |
---|
| 1073 | |
---|
| 1074 | * glplib2.c |
---|
| 1075 | Alternative version of the routines umalloc, ucalloc, and ufree |
---|
| 1076 | was provided. It does not limit the amount of allocated memory |
---|
| 1077 | to INT_MAX bytes and therefore can be used on platforms where |
---|
| 1078 | sizeof(void *) > sizeof(int). To enable this version one should |
---|
| 1079 | define the preprocessor variable GLP_HUGE_MEM. |
---|
| 1080 | |
---|
| 1081 | * glprng.c |
---|
| 1082 | The routine rng_create_rand was changed to initialize the |
---|
| 1083 | generator using seed = 1, not 0, to conform ISO C requirements. |
---|
| 1084 | |
---|
| 1085 | * glpgmp.h, glpgmp.c |
---|
| 1086 | A set of bignum arithmetic routines implementing operations on |
---|
| 1087 | integers and rationals was added. These routines are compatible |
---|
| 1088 | with the GNU MP library. |
---|
| 1089 | |
---|
| 1090 | NOTE: To attain a much better performance it is recommended to |
---|
| 1091 | use, if possible, the original GNU MP library rather than the |
---|
| 1092 | GLPK version, by defining the preprocessor variable GLP_USE_GMP. |
---|
| 1093 | |
---|
| 1094 | * glplux.h, glplux.c |
---|
| 1095 | A tentative implementation of sparse LU-factorization based on |
---|
| 1096 | exact (bignum) arithmetic was added. |
---|
| 1097 | |
---|
| 1098 | * glpssx.h, glpssx.c |
---|
| 1099 | A tentative implementation of some simplex method routines based |
---|
| 1100 | on exact (bignum) arithmetic was added. |
---|
| 1101 | |
---|
| 1102 | * glplpx6f.c |
---|
| 1103 | A preliminary implementation of the routine lpx_exact_check was |
---|
| 1104 | added. This routine checks the current basis for primal and dual |
---|
| 1105 | feasibility using exact (bignum) arithmetic. |
---|
| 1106 | |
---|
| 1107 | * examples/glpsol.c |
---|
| 1108 | The command-line option '--xcheck' was introduced to check the |
---|
| 1109 | current basis for feasibility using exact (bignum) arithmetic. |
---|
| 1110 | |
---|
| 1111 | Tue Jul 25 12:00:00 2006 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1112 | |
---|
| 1113 | * GLPK 4.11 has been released. |
---|
| 1114 | |
---|
| 1115 | * include/glpbfi.h, src/glpbfi.c |
---|
| 1116 | Basis factorization interface routines were added. |
---|
| 1117 | |
---|
| 1118 | * include/glpluf.h, src/glpluf1.c |
---|
| 1119 | Hypersparse solution routines were added. |
---|
| 1120 | |
---|
| 1121 | * include/glpinv.h, src/glpinv1.c |
---|
| 1122 | Hypersparse solution routines (fake version) were added. |
---|
| 1123 | |
---|
| 1124 | * include/glpmpl.h, src/glpmpl.c |
---|
| 1125 | Built-in functions card, length, and substr were implemented. |
---|
| 1126 | Output redirection in the printf statement was implemented. |
---|
| 1127 | |
---|
| 1128 | * examples/graph.mod, examples/crypto.mod |
---|
| 1129 | Two example models illustrating new features of the modeling |
---|
| 1130 | language were included. |
---|
| 1131 | |
---|
| 1132 | Thu May 11 12:00:00 2006 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1133 | |
---|
| 1134 | * GLPK 4.10 has been released. |
---|
| 1135 | |
---|
| 1136 | * src/glplpx8a.c |
---|
| 1137 | A fragment was added to the routines lpx_read_mps and |
---|
| 1138 | lpx_read_freemps to accept LI bound type (it is similar to LO, |
---|
| 1139 | however, additionally marks the column as integer). |
---|
| 1140 | |
---|
| 1141 | * include/glpbfi.h, src/glpbfi.c |
---|
| 1142 | The module glpbfi which implements the basis factorization |
---|
| 1143 | interface (BFI) was added. |
---|
| 1144 | |
---|
| 1145 | * src/glplpx7a.c |
---|
| 1146 | The routine lpx_cover_cut to generate mixed cover cuts was |
---|
| 1147 | added. |
---|
| 1148 | |
---|
| 1149 | * src/glplpx7b.c |
---|
| 1150 | The routine lpx_clique_cut to generate clique cuts and related |
---|
| 1151 | routines to maintain the conflict graph were added. |
---|
| 1152 | |
---|
| 1153 | * include/glplpx.h, src/glplpx5.c |
---|
| 1154 | The routine lpx_cpx_basis implementing Bixby's algorithm to |
---|
| 1155 | construct an initial LP basis was added. |
---|
| 1156 | |
---|
| 1157 | * examples/glpsol.c |
---|
| 1158 | Command-line option '--bib' was added which allows building |
---|
| 1159 | an initial LP basis using Bixby's algorithm. |
---|
| 1160 | Default command-line option '--mps' was changed to '--freemps'. |
---|
| 1161 | |
---|
| 1162 | * examples/cf12a.mod, examples/cf12b.mod |
---|
| 1163 | Two examples in MathProg (curve fitting problem) were added. |
---|
| 1164 | Thanks to Dr. Harley Mackenzie <hjm@hardsoftware.com>. |
---|
| 1165 | |
---|
| 1166 | Tue Jan 17 12:00:00 2006 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1167 | |
---|
| 1168 | * GLPK 4.9 has been released. |
---|
| 1169 | |
---|
| 1170 | * glpipp.h, glpipp1.c, glpipp2.c |
---|
| 1171 | A MIP presolver were implemented (currently incomplete). It is |
---|
| 1172 | used internally in the routine lpx_intopt (see below). |
---|
| 1173 | |
---|
| 1174 | * glplpx6d.c, glplpx7a.c |
---|
| 1175 | An advanced branch-and-bound solver (the routine lpx_intopt) |
---|
| 1176 | were implemented. |
---|
| 1177 | |
---|
| 1178 | * glplpx6c.c |
---|
| 1179 | The routine lpx_check_int to check MIP feasibility conditions |
---|
| 1180 | was added. |
---|
| 1181 | |
---|
| 1182 | * glplpx8a.c |
---|
| 1183 | The routine lpx_print_mip was changed to print MIP feasibility |
---|
| 1184 | conditions. |
---|
| 1185 | |
---|
| 1186 | * glpmpl.h, glpmpl1.c, glpmpl3.c |
---|
| 1187 | The built-in functions sin, cos, atan, and atan2 were added to |
---|
| 1188 | the MathProg language. |
---|
| 1189 | |
---|
| 1190 | * doc/lang.* |
---|
| 1191 | Some typos were fixed. |
---|
| 1192 | Thanks to Minh Ha Duong <haduong@centre-cired.fr> (CIRED, CNRS). |
---|
| 1193 | |
---|
| 1194 | Wed Jan 12 12:00:00 2005 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1195 | |
---|
| 1196 | * GLPK 4.8 has been released. |
---|
| 1197 | |
---|
| 1198 | * glpspx.h, glpspx1.c, glpspx2.c, glplpx6a.c |
---|
| 1199 | Simplex method routines were changed due to a new format of the |
---|
| 1200 | constraint matrix. |
---|
| 1201 | |
---|
| 1202 | * glpmat.h, glpmat.c |
---|
| 1203 | Sparse matrix routines were re-implemented using storage-by-rows |
---|
| 1204 | format. |
---|
| 1205 | |
---|
| 1206 | * glpipm.h, glpipm.c, glplpx6b.c |
---|
| 1207 | Interior-point method routines were changed due to a new format |
---|
| 1208 | of sparse matrices. |
---|
| 1209 | |
---|
| 1210 | * glpchol.h, glpchol.c |
---|
| 1211 | Old version of Cholesky factorization routines being replaced by |
---|
| 1212 | a new one (see glpmat.c) was removed from the package. |
---|
| 1213 | |
---|
| 1214 | * glplpx8c.c |
---|
| 1215 | Minor bug was fixed in api routine lpx_read_cpxlp. |
---|
| 1216 | |
---|
| 1217 | Mon Aug 23 12:00:00 2004 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1218 | |
---|
| 1219 | * GLPK 4.7 has been released. |
---|
| 1220 | |
---|
| 1221 | * glplpx.h, glplpx1.c |
---|
| 1222 | New core API routines were added (but not documented yet): |
---|
| 1223 | lpx_order_matrix, lpx_create_index, lpx_find_row, lpx_find_col, |
---|
| 1224 | lpx_delete_index. |
---|
| 1225 | |
---|
| 1226 | * glplpx8a.c |
---|
| 1227 | API routine lpx_read_mps was re-implemented, and two new API |
---|
| 1228 | routines lpx_read_freemps and lpx_write_freemps were added to |
---|
| 1229 | support free MPS format. |
---|
| 1230 | |
---|
| 1231 | * glplpx8c.c |
---|
| 1232 | Two API routines lpx_read_cpxlp and lpx_write_cpxlp (formerly |
---|
| 1233 | named lpx_read_lpt and lpx_write_lpt) were re-implemented. |
---|
| 1234 | |
---|
| 1235 | * glpmps.h, glpmps.c |
---|
| 1236 | This module formerly used in lpx_read_mps was removed from the |
---|
| 1237 | package. |
---|
| 1238 | |
---|
| 1239 | * glplpt.h, glplpt.c |
---|
| 1240 | This module formerly used in lpx_read_lpt was removed from the |
---|
| 1241 | package. |
---|
| 1242 | |
---|
| 1243 | * glpmip.h, glpmip1.h, glpmip2.h |
---|
| 1244 | New MIP routines mip_best_node and mip_relative_gap were added |
---|
| 1245 | due to suggestion of Brady Hunsaker <hunsaker@engr.pitt.edu>. |
---|
| 1246 | |
---|
| 1247 | * glpsol.c |
---|
| 1248 | The following new command-options were added: |
---|
| 1249 | --freemps to read problem data in free MPS format |
---|
| 1250 | --wfreemps to write problem data in free MPS format |
---|
| 1251 | --cpxlp to read problem data in CPLEX LP format |
---|
| 1252 | --wcpxlp to write problem data in CPLEX LP format |
---|
| 1253 | --bas to read LP basis from a text file in MPS format |
---|
| 1254 | --wbas to write LP basis to a text file in MPS format |
---|
| 1255 | --mostf to use "most fractional" branching heuristic |
---|
| 1256 | --bestb to use "best bound" backtracking heuristic |
---|
| 1257 | |
---|
| 1258 | * contrib/deli/*.* |
---|
| 1259 | GLPK Delphi interface module was temporarily removed from the |
---|
| 1260 | distribution due to licensing problems. |
---|
| 1261 | |
---|
| 1262 | * contrib/glpkmex/*.* |
---|
| 1263 | GLPK Matlab interface module was temporarily removed from the |
---|
| 1264 | distribution due to licensing problems. |
---|
| 1265 | |
---|
| 1266 | * contrib/jni/*.* |
---|
| 1267 | GLPK Java interface module was temporarily removed from the |
---|
| 1268 | distribution due to licensing problems. |
---|
| 1269 | |
---|
| 1270 | Wed Aug 04 12:00:00 2004 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1271 | |
---|
| 1272 | * GLPK 4.6 has been released. |
---|
| 1273 | |
---|
| 1274 | * glpmpl.h, glpmpl1.c, glpmpl2.c, glpmpl3.c, glpmpl4.c |
---|
| 1275 | Three new statements were implemented in the GNU MathProg |
---|
| 1276 | language: solve, printf, and for. Also some bugs were fixed. |
---|
| 1277 | |
---|
| 1278 | * glplpx.h, glplpx8e.c |
---|
| 1279 | Two API routines were added: lpx_read_prob and lpx_write_prob, |
---|
| 1280 | which allow reading and writing problem data in GNU LP format. |
---|
| 1281 | |
---|
| 1282 | * glpsol.c |
---|
| 1283 | Three new command-line options were added: --glp (to read |
---|
| 1284 | problem data in GNU LP format), --wglp (to write problem data |
---|
| 1285 | in GNU LP format), and --name (to change problem name). |
---|
| 1286 | |
---|
| 1287 | * glprng.h, glprng.c |
---|
| 1288 | A portable pseudo-random number generator was implemented as a |
---|
| 1289 | separate module. |
---|
| 1290 | |
---|
| 1291 | * glplib4.c |
---|
| 1292 | The old implementation of a pseudo-random number generator was |
---|
| 1293 | removed from the package. |
---|
| 1294 | |
---|
| 1295 | * doc/lang.*, doc/refman.* |
---|
| 1296 | New edition of the GLPK documentation was included. |
---|
| 1297 | |
---|
| 1298 | * contrib/glpkmex/*.* |
---|
| 1299 | A new version of GLPKMEX was included in the distribution. For |
---|
| 1300 | more details see contrib/glpkmex/ChangeLog. |
---|
| 1301 | |
---|
| 1302 | Mon Jul 19 12:00:00 2004 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1303 | |
---|
| 1304 | * GLPK 4.5 has been released. |
---|
| 1305 | |
---|
| 1306 | * glpmip.h, glpmip1.c, glpmip2.c, glplpx6c.c |
---|
| 1307 | New implementation of the branch-and-bound method was added. |
---|
| 1308 | It replaces the old implementation, which was removed from the |
---|
| 1309 | package. |
---|
| 1310 | |
---|
| 1311 | * glpies.h, glpies1.c, glpies2.c, glpies3.c |
---|
| 1312 | Modules used in the old implementation of the branch-and-bound |
---|
| 1313 | method were removed from the package. |
---|
| 1314 | |
---|
| 1315 | * glplib2.c |
---|
| 1316 | Now if the preprocessor variable GLPHUGEMEM is defined, other |
---|
| 1317 | version of the routines umalloc, ucalloc, and ufree is used on |
---|
| 1318 | compiling the package. This allows avoiding memory allocation |
---|
| 1319 | problems on platforms where sizeof(void *) > sizeof(int), for |
---|
| 1320 | example, where addresses are 64-bit while integers are 32-bit. |
---|
| 1321 | The modification was made due to a bug report provided by Karel |
---|
| 1322 | Zimmermann <kzimm@diamant.jouy.inra.fr> and Christophe Caron |
---|
| 1323 | <caron@diamant.jouy.inra.fr>. |
---|
| 1324 | |
---|
| 1325 | Sat Jan 17 12:00:00 2004 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1326 | |
---|
| 1327 | * GLPK 4.4 has been released. |
---|
| 1328 | |
---|
| 1329 | * glplpx.h, glplpx*.c |
---|
| 1330 | All API routines were re-implemented using new data structures. |
---|
| 1331 | Some new API routines were added and some existing API routines |
---|
| 1332 | became obsolete as shown below: |
---|
| 1333 | |
---|
| 1334 | Obsolete API routine Equivalent new API routine |
---|
| 1335 | lpx_check_name (no more supported) |
---|
| 1336 | lpx_set_obj_c0 lpx_set_obj_coef |
---|
| 1337 | lpx_set_row_coef (no more supported) |
---|
| 1338 | lpx_set_col_coef lpx_set_obj_coef |
---|
| 1339 | lpx_load_mat (no more supported) |
---|
| 1340 | lpx_load_mat3 lpx_load_matrix |
---|
| 1341 | lpx_unmark_all (no more supported) |
---|
| 1342 | lpx_mark_row (no more supported) |
---|
| 1343 | lpx_mark_col (no more supported) |
---|
| 1344 | lpx_clear_mat (no more supported) |
---|
| 1345 | lpx_del_items lpx_del_rows, lpx_del_cols |
---|
| 1346 | lpx_get_row_bnds lpx_get_row_type, lpx_get_row_lb, |
---|
| 1347 | lpx_get_row_ub |
---|
| 1348 | lpx_get_col_bnds lpx_get_col_type, lpx_get_col_lb, |
---|
| 1349 | lpx_get_col_ub |
---|
| 1350 | lpx_get_obj_c0 lpx_get_obj_coef |
---|
| 1351 | lpx_get_row_coef (no more supported) |
---|
| 1352 | lpx_get_col_coef lpx_get_obj_coef |
---|
| 1353 | lpx_get_row_mark (no more supported) |
---|
| 1354 | lpx_get_col_mark (no more supported) |
---|
| 1355 | lpx_get_row_info lpx_get_row_stat, lpx_get_row_prim, |
---|
| 1356 | lpx_get_row_dual |
---|
| 1357 | lpx_get_col_info lpx_get_col_stat, lpx_get_col_prim, |
---|
| 1358 | lpx_get_col_dual |
---|
| 1359 | lpx_get_ips_stat lpx_ipt_status |
---|
| 1360 | lpx_get_ips_row lpx_ipt_row_prim, lpx_ipt_row_dual |
---|
| 1361 | lpx_get_ips_col lpx_ipt_col_prim, lpx_ipt_col_dual |
---|
| 1362 | lpx_get_ips_obj lpx_ipt_obj_val |
---|
| 1363 | lpx_get_mip_stat lpx_mip_status |
---|
| 1364 | lpx_get_mip_row lpx_mip_row_val |
---|
| 1365 | lpx_get_mip_col lpx_mip_col_val |
---|
| 1366 | lpx_get_mip_obj lpx_mip_obj_val |
---|
| 1367 | |
---|
| 1368 | Obsolete API routines were kept for backward compatibility, |
---|
| 1369 | however, they will be removed in the future. |
---|
| 1370 | |
---|
| 1371 | * doc/refman.* |
---|
| 1372 | New edition of the GLPK reference manual containing description |
---|
| 1373 | of all new API routines was included. |
---|
| 1374 | |
---|
| 1375 | * contrib/glpkmex/*.* |
---|
| 1376 | GLPKMEX, a Matlab MEX interface to GLPK package, contributed by |
---|
| 1377 | Nicolo Giorgetti <giorgetti@dii.unisi.it> was included. |
---|
| 1378 | |
---|
| 1379 | * doc/GLPK_FAQ.txt |
---|
| 1380 | GLPK FAQ contributed by Harley Mackenzie <hjm@bigpond.com> was |
---|
| 1381 | included. |
---|
| 1382 | |
---|
| 1383 | Fri Dec 12 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1384 | |
---|
| 1385 | * GLPK 4.3 has been released. |
---|
| 1386 | |
---|
| 1387 | * configure.in |
---|
| 1388 | The bug, due to which the standard math library is not linked on |
---|
| 1389 | some platforms, was fixed. |
---|
| 1390 | |
---|
| 1391 | * glpmpl3.c |
---|
| 1392 | The bug (0 ** y) was fixed in the routine fp_power. |
---|
| 1393 | |
---|
| 1394 | * glpmpl.h, glpmpl1.c, glpmpl3.c |
---|
| 1395 | Some new built-in functions (round, trunc, Irand224, Uniform01, |
---|
| 1396 | Uniform, Normal01, Normal) were added to the MathProg language. |
---|
| 1397 | |
---|
| 1398 | * glpmpl1.c |
---|
| 1399 | The MathProg syntax was changed to allow writing 'subj to'. |
---|
| 1400 | |
---|
| 1401 | * glplpx.h, glplpx1.c, glplpx2.c |
---|
| 1402 | The new api routine lpx_get_ray_info was added. |
---|
| 1403 | |
---|
| 1404 | * glplpx8a.c |
---|
| 1405 | The api routine lpx_print_sol was changed to print the number of |
---|
| 1406 | non-basic variable, which causes primal unboundness. |
---|
| 1407 | |
---|
| 1408 | * glpmps.c |
---|
| 1409 | The code was changed to avoid errors on compiling the package on |
---|
| 1410 | Mac OS X. Thanks to Andre Girard <andre@inrs-emt.uquebec.ca> for |
---|
| 1411 | the bug report. |
---|
| 1412 | |
---|
| 1413 | * doc/lang.*, doc/refman.* |
---|
| 1414 | Several typos were fixed and some new material was added in the |
---|
| 1415 | glpk documentation. |
---|
| 1416 | |
---|
| 1417 | Fri Nov 14 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1418 | |
---|
| 1419 | * GLPK 4.2 has been released. |
---|
| 1420 | |
---|
| 1421 | * glpiet.h, glpiet.c, glpios.h, glpios1.c, glpios2.c, glpios3.c |
---|
| 1422 | A preliminary implementation of the Integer Optimization Suite |
---|
| 1423 | (IOS) was included in the package. Eventually IOS will replace |
---|
| 1424 | the Implicit Enumeration Suite (IES). |
---|
| 1425 | |
---|
| 1426 | * glplpx.h, glplpx6d.c |
---|
| 1427 | A dummy version of the integer optimization routine lpx_intopt |
---|
| 1428 | was included in the package. Later this routine will replace the |
---|
| 1429 | routine lpx_integer. |
---|
| 1430 | |
---|
| 1431 | * examples/glpsol.c |
---|
| 1432 | A new command-line option --int-opt was added to the solver to |
---|
| 1433 | call lpx_intopt rather than lpx_integer. |
---|
| 1434 | |
---|
| 1435 | * glpbcs.h, glpbcs1.c, glpbcs2.c |
---|
| 1436 | Being replaced by IOS routines (see above) the Branch-and-Cut |
---|
| 1437 | Framework (BCS) routines were removed from the package. |
---|
| 1438 | |
---|
| 1439 | * examples/tspsol.c |
---|
| 1440 | Stand-alone Symmetric TSP solver was completely re-programmed |
---|
| 1441 | using IOS routines. |
---|
| 1442 | |
---|
| 1443 | * glplib.h, glplib2.c, glplib4.c |
---|
| 1444 | The random-number generator was implemented. It is based on the |
---|
| 1445 | module GB_FLIB from the Stanford GraphBase originally developed |
---|
| 1446 | by Donald Knuth. |
---|
| 1447 | |
---|
| 1448 | * glphbsm.c, glplpx8a.c, glpmps.c |
---|
| 1449 | All calls to fopen/fclose were replaced by corresponding calls |
---|
| 1450 | to ufopen/ufclose due to bug reports provided by Morten Welinder |
---|
| 1451 | <terra@gnu.org> and <jpark@sfwmd.gov>. |
---|
| 1452 | |
---|
| 1453 | * glpmps.c |
---|
| 1454 | The code was made re-entrant. |
---|
| 1455 | |
---|
| 1456 | * glplpx8b.c |
---|
| 1457 | API routine lpx_print_sens_bnds for bounds sensitivity analysis |
---|
| 1458 | contributed by Brady Hunsaker <hunsaker@engr.pitt.edu> was added |
---|
| 1459 | to the package. This feature is also available in glpsol via the |
---|
| 1460 | command-line option --bounds. |
---|
| 1461 | |
---|
| 1462 | * contrib/jni/*.* |
---|
| 1463 | New version of GLPK JNI (Java Native Interface) contributed by |
---|
| 1464 | Chris Rosebrugh <cpr@pobox.com> was added to the package. |
---|
| 1465 | |
---|
| 1466 | * contrib/deli/*.* |
---|
| 1467 | GLPK DELI (Delphi Interface) contributed by Ivo van Baren |
---|
| 1468 | <i.van.baren@freeler.nl> was added to the package. |
---|
| 1469 | |
---|
| 1470 | * glplpx3.c |
---|
| 1471 | Default method to scale the problem was changed to equilibration |
---|
| 1472 | scaling (lp->scale = 1 in lpx_reset_parms). |
---|
| 1473 | |
---|
| 1474 | * glplpx6a.c |
---|
| 1475 | Two minor (non-critical) typos were fixed due to report provided |
---|
| 1476 | by Andrew Hamilton-Wright <andrewhw@ieee.org>. |
---|
| 1477 | |
---|
| 1478 | * glplpp2.c |
---|
| 1479 | An untested case (line 941) had been tested due to bug report |
---|
| 1480 | provided by Jiri Spitz <jiri.spitz@telecom.cz>. |
---|
| 1481 | |
---|
| 1482 | * w32bc5.mak, w32vc6.mak, w32vc6d.mak, d32dmc.mak |
---|
| 1483 | Several makefiles were added to allow building GLPK library for |
---|
| 1484 | some non-GNU 32-bit platforms. |
---|
| 1485 | |
---|
| 1486 | Sat Aug 23 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1487 | |
---|
| 1488 | * GLPK 4.1 has been released. |
---|
| 1489 | |
---|
| 1490 | * glpmpl1.c, glpmpl3.c |
---|
| 1491 | Some bugs were fixed in the MathProg translator due to the bug |
---|
| 1492 | reports provided by Giles Thompson <gwpt1@cus.cam.ac.uk>: |
---|
| 1493 | conditional set expressions were incorrectly parsed; |
---|
| 1494 | dimen attribute was not set by default when a set was used |
---|
| 1495 | recursively in its own declaration; |
---|
| 1496 | logical expressions ... in if ... then ... else ... did not |
---|
| 1497 | work; |
---|
| 1498 | displaying set expressions did not free memory allocated for |
---|
| 1499 | temporary results. |
---|
| 1500 | |
---|
| 1501 | * glpmpl3.c (reduce_terms) |
---|
| 1502 | Implementation of summation of linear forms over domain was |
---|
| 1503 | improved to reduce complexity of that operation from O(n*n) to |
---|
| 1504 | O(n*log n). The improvement was made due to a report provided |
---|
| 1505 | by Sebastien de Menten <sdementen@hotmail.com>. |
---|
| 1506 | |
---|
| 1507 | * glplpx6a.c (line 1056), glpmip1.c (line 641) |
---|
| 1508 | Two minor bugs were fixed due to the bug report provided by |
---|
| 1509 | Kendall Demaree <kendal.demaree@verizon.net>. |
---|
| 1510 | |
---|
| 1511 | * glplpx.h, glplpx6a.c |
---|
| 1512 | The method of one artificial variable implemented in the routine |
---|
| 1513 | lpx_prim_art and used on the phase I in the glpk simplex solver |
---|
| 1514 | has a serious defect: for some lp instances it erroneously |
---|
| 1515 | reports that the problem has no primal feasible solution. This |
---|
| 1516 | error appears when the column of the artificial variable, which |
---|
| 1517 | enters the basis to make it primal feasible, has large |
---|
| 1518 | constraint coefficients, that leads to small reduced costs of |
---|
| 1519 | non-basic variables and premature termination of the search, |
---|
| 1520 | i.e. to wrong conclusion that the problem has no primal feasible |
---|
| 1521 | solution. To avoid this defect the routine lpx_prim_feas was |
---|
| 1522 | included. It implements the method of implicit artifical |
---|
| 1523 | variables (based on minimization of the sum of infeasibilities), |
---|
| 1524 | which is a bit slower but much more robust. The routine |
---|
| 1525 | lpx_prim_feas having the same functionality now is used instead |
---|
| 1526 | the routine lpx_prim_art. |
---|
| 1527 | |
---|
| 1528 | * glpinv.h, glpinv.c |
---|
| 1529 | The test used in the routine inv_update to detect low accuracy |
---|
| 1530 | after updating LU-factorization of the basis matrix was replaced |
---|
| 1531 | by a new, more robust test. |
---|
| 1532 | |
---|
| 1533 | * glplpx6c.c |
---|
| 1534 | Selecting an active node to be solved next in the routine |
---|
| 1535 | btrack_bestp was changed. Now, if any integer feasible solution |
---|
| 1536 | has not been found yet, the routine chooses an active node which |
---|
| 1537 | has the minimal sum of integer infeasibilities. |
---|
| 1538 | |
---|
| 1539 | * glpmip.h, glpmip1.c |
---|
| 1540 | The additional flag int_obj was included in the structure |
---|
| 1541 | MIPTREE used by the branch-and-bound. This flag is set in the |
---|
| 1542 | routine mip_create_tree and used in the routine is_better. It |
---|
| 1543 | means that the objective is integral, i.e. depends only on |
---|
| 1544 | integer variables with integer objective coefficients. The test |
---|
| 1545 | used in the routine check_integrality was also replaced by a |
---|
| 1546 | new, more reasonable one. |
---|
| 1547 | |
---|
| 1548 | * glplpx1.c |
---|
| 1549 | A minor bug was fixed in the routine lpx_check_name. |
---|
| 1550 | |
---|
| 1551 | * glpmpl.h, glpmpl4.c, glplpx8d.c |
---|
| 1552 | The flag skip_data was added to the parameter list of the |
---|
| 1553 | routine mpl_read_model. If this flag is set, the data section |
---|
| 1554 | in the model file is ignored. Corresponding change was made in |
---|
| 1555 | the routine lpx_read_model. Now, if both model and data files |
---|
| 1556 | are specified, the data section in the model file is ignored. |
---|
| 1557 | |
---|
| 1558 | * glplpx8c.c |
---|
| 1559 | A minor bug (wrong format used for writing free columns) in the |
---|
| 1560 | routine lpx_write_lpt was fixed due to the bug report provided |
---|
| 1561 | by Bernhard Schmidt <schmidt@math.uni-augsburg.de> |
---|
| 1562 | |
---|
| 1563 | * sample/glpsol.c |
---|
| 1564 | The command-line parameter --tmlim, which allows limiting the |
---|
| 1565 | solution time, was added. |
---|
| 1566 | |
---|
| 1567 | * doc/lang.*, doc/refman.* |
---|
| 1568 | New edition of the GLPK documentation was included. |
---|
| 1569 | |
---|
| 1570 | * java-binding/*.* |
---|
| 1571 | New version of the GLPK JNI (Java Native Interface) package was |
---|
| 1572 | included in the distribution. |
---|
| 1573 | |
---|
| 1574 | * sample/lpglpk40.c |
---|
| 1575 | A non-trivial example was added. It allows using GLPK as a base |
---|
| 1576 | LP solver for Concorde, a program for solving Traveling Salesman |
---|
| 1577 | Problem (TSP). For details see comments in lpglpk40.c. |
---|
| 1578 | |
---|
| 1579 | * sample/*.mod |
---|
| 1580 | Some examples of LP and MIP models written in GNU MathProg were |
---|
| 1581 | added. |
---|
| 1582 | |
---|
| 1583 | Tue May 06 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1584 | |
---|
| 1585 | * GLPK 4.0 has been released. |
---|
| 1586 | |
---|
| 1587 | * glpmpl.h, glpmpl1.c, glpmpl2.c, glpmpl3.c, glpmpl4.c |
---|
| 1588 | The model translator for the GNU MathProg modeling language was |
---|
| 1589 | implemented and included in the package. |
---|
| 1590 | |
---|
| 1591 | * glplpx.h, glplpx8d.c |
---|
| 1592 | The api routine lpx_read_model, which is an interface to the |
---|
| 1593 | MathProg translator, was included in the package. |
---|
| 1594 | |
---|
| 1595 | * glplpx.h, glplpx8a.c |
---|
| 1596 | The api routine lpx_print_prob for writing LP/MIP problem data |
---|
| 1597 | in plain text format was included in the package. |
---|
| 1598 | |
---|
| 1599 | * sample/glpsol.c |
---|
| 1600 | New version of the GLPK stand-alone LP/MIP solver that supports |
---|
| 1601 | the GNU MathProg modeling language was implemented. |
---|
| 1602 | |
---|
| 1603 | * doc/lang.latex, doc/lang.dvi, doc/lang.ps |
---|
| 1604 | The document "GLPK: Modeling Language GNU MathProg" was included |
---|
| 1605 | in the package. |
---|
| 1606 | |
---|
| 1607 | * doc/refman.latex, doc/refman.dvi, doc/refman.ps |
---|
| 1608 | New edition of the GLPK Reference Manual was included in the |
---|
| 1609 | package. |
---|
| 1610 | |
---|
| 1611 | * glplpx8c.c |
---|
| 1612 | A bug in the api routine lpx_write_lpt was fixed. Due to that |
---|
| 1613 | bug an addressing error occured in the routine if the objective |
---|
| 1614 | function has the non-zero constant term. |
---|
| 1615 | |
---|
| 1616 | * glplan.h, glplan1.c, glplan2.c, glplan3.c, glplan4.c, |
---|
| 1617 | * glplan5.c, glplan6.c, glplan7.c, glplan8.c, glplpx8b.c |
---|
| 1618 | All modules of the translator for the GLPK/L modeling language |
---|
| 1619 | were removed from the package, because GLPK/L being completely |
---|
| 1620 | superseded by GNU MathProg is no more supported. |
---|
| 1621 | |
---|
| 1622 | Tue Mar 25 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1623 | |
---|
| 1624 | * GLPK 3.3 has been released. |
---|
| 1625 | |
---|
| 1626 | * glplpp.h, glplpp1.c, glplpp2.c |
---|
| 1627 | An implementation of the built-in LP presolver was added to the |
---|
| 1628 | package. |
---|
| 1629 | |
---|
| 1630 | * glplpx.h |
---|
| 1631 | The flag presol was added to the structure LPX. This flag tells |
---|
| 1632 | the lpx_simplex whether the built-in LP presolver should be used |
---|
| 1633 | or not. By default this flag is off. Also three macros (namely |
---|
| 1634 | LPX_E_NOPFS, LPX_E_NODFS, and LPX_K_PRESOL) that concern using |
---|
| 1635 | the LP presolver were introduced. |
---|
| 1636 | |
---|
| 1637 | * glplpx3.c, glplpx6a.c |
---|
| 1638 | These modules was changed to use the built-in LP presolver. |
---|
| 1639 | |
---|
| 1640 | * sample/glpsol.c |
---|
| 1641 | Command line options --presol and --nopresol that concern using |
---|
| 1642 | the LP presolver were added to the stand-alone LP/MIP solver. |
---|
| 1643 | |
---|
| 1644 | * glplan1.c |
---|
| 1645 | This module was changed to allow declaring sets like A[1:10] in |
---|
| 1646 | the models written in the GLPK/L modeling language. |
---|
| 1647 | |
---|
| 1648 | * doc/refman.latex, doc/lang.latex |
---|
| 1649 | New editions of the documents "GLPK User's Guide" and "GLPK/L |
---|
| 1650 | Modeling Language" were included in the distribution. |
---|
| 1651 | |
---|
| 1652 | * java-binding/*.* |
---|
| 1653 | The package GLPK JNI (Java Native Interface) implementing Java |
---|
| 1654 | binding for GLPK was included in the distribution. This package |
---|
| 1655 | was developed and programmed by Yuri Victorovich <yuri@gjt.org>. |
---|
| 1656 | |
---|
| 1657 | Tue Feb 18 12:00:00 2003 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1658 | |
---|
| 1659 | * GLPK 3.2.4 has been released. |
---|
| 1660 | |
---|
| 1661 | * glplpx6b.c |
---|
| 1662 | The code was changed to allow auxiliary variables have non-zero |
---|
| 1663 | objective coefficients. |
---|
| 1664 | |
---|
| 1665 | Also a minor bug was fixed (the constant term was not considered |
---|
| 1666 | on displaying the objective function value). |
---|
| 1667 | |
---|
| 1668 | * sample/glpsol.c |
---|
| 1669 | The code was changed to fix a bug (the command-line option 'bfs' |
---|
| 1670 | was not recognized). The bug was fixed due to report provided by |
---|
| 1671 | Olivier <odwl@skynet.be>. |
---|
| 1672 | |
---|
| 1673 | * glplpt.c |
---|
| 1674 | The code was changed to fix a bug (binary variables were treated |
---|
| 1675 | erroneously as integer ones). |
---|
| 1676 | |
---|
| 1677 | * glplpx6b.c |
---|
| 1678 | The code was changed to fix a bug (variables that have no lower |
---|
| 1679 | bounds were incorrectly processed on converting to the standard |
---|
| 1680 | formulation). The bug was fixed due to report kindly provided by |
---|
| 1681 | Kjell Eikland <kjell.eikland@broadpark.no>. |
---|
| 1682 | |
---|
| 1683 | Mon Nov 11 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1684 | |
---|
| 1685 | * GLPK 3.2.3 has been released. |
---|
| 1686 | |
---|
| 1687 | * glpmip.h, glpmip1.c |
---|
| 1688 | A preliminary implementation of the branch-and-bound driver |
---|
| 1689 | based on the implicit enumeration suite (glpies) was added to |
---|
| 1690 | the package. This module is not documented yet. |
---|
| 1691 | |
---|
| 1692 | * glplpx6c.c |
---|
| 1693 | A new implementation of the api routine lpx_integer which now |
---|
| 1694 | is based on the b&b driver (see glpmip above) was included in |
---|
| 1695 | the package. This new implementation has exactly the same |
---|
| 1696 | functionality as the old version and therefore all changes are |
---|
| 1697 | transparent to the api user. |
---|
| 1698 | |
---|
| 1699 | * glpbbm.h, glpbbm.c |
---|
| 1700 | * glprsm.h, glprsm1.c, glprsm2.c |
---|
| 1701 | * glplp.h, glplp.c |
---|
| 1702 | These modules were removed from the package, because they were |
---|
| 1703 | used only in the old version of the routine lpx_integer, which |
---|
| 1704 | was replaced by the new version (see glplpx6c above). |
---|
| 1705 | |
---|
| 1706 | * glplpx.h, glplpx6a.c |
---|
| 1707 | The api routine lpx_check_kkt was included in the package and |
---|
| 1708 | its description was added in the reference manual. This routine |
---|
| 1709 | allows checking Karush-Kuhn-Tucker optimality conditions for an |
---|
| 1710 | LP solution. |
---|
| 1711 | |
---|
| 1712 | * glplpx.h, glplpx8a.c |
---|
| 1713 | Now the api routine lpx_print_sol also prints information about |
---|
| 1714 | "solution quality" obtained via the api routine lpx_check_kkt. |
---|
| 1715 | |
---|
| 1716 | * glplpx.h, glplpx8a.c |
---|
| 1717 | New api routines lpx_read_bas and lpx_write_bas were included |
---|
| 1718 | in the package and documented. The routine lpx_write_bas allows |
---|
| 1719 | writing a current basis from an LP object to a text file in the |
---|
| 1720 | MPS format. The routine lpx_read_bas allows reading a basis |
---|
| 1721 | prepared in the MPS format from a text file into an LP object. |
---|
| 1722 | |
---|
| 1723 | * glplpt.c |
---|
| 1724 | The parsing routine which reads LP problem data prepared in the |
---|
| 1725 | CPLEX LP format was modified to allow specifying lower bounds |
---|
| 1726 | of variables also in the form 'variable >= lower bound' (in the |
---|
| 1727 | bounds section). This modification was made due to a notice |
---|
| 1728 | provided by Ivan Luzzi <iluzzi@libero.it>. |
---|
| 1729 | |
---|
| 1730 | * glplpx.h, glplpx8c.c |
---|
| 1731 | The api routine lpx_write_lpt which allows writing LP problem |
---|
| 1732 | data from an LP object to a text file using the CPLEX LP format |
---|
| 1733 | was included in the package and documented. |
---|
| 1734 | |
---|
| 1735 | * glplpx.h, glplpx3.c |
---|
| 1736 | The control parameter LPX_K_LPTORIG that affects the behavior |
---|
| 1737 | of the api routine lpx_write_lpt was introduced. |
---|
| 1738 | |
---|
| 1739 | * glplan6.c |
---|
| 1740 | The semantics of the language GLPK/L was changed to allow |
---|
| 1741 | selection in case when not all mute letters of a predicate (the |
---|
| 1742 | operand that follows the keyword 'where') are presented in a |
---|
| 1743 | parameter (the operand that precedes the keyword 'where'), i.e. |
---|
| 1744 | to allow writing something like this: |
---|
| 1745 | y[j] := sum(i, x[i] where p[i,j]); |
---|
| 1746 | The paragraph "Selection" in the langauge description (page 25) |
---|
| 1747 | was also correspondingly changed. This change of the language |
---|
| 1748 | semantics was undertaken due to a notice provided by Peter Lee |
---|
| 1749 | <plee@kinggee.com.au>. |
---|
| 1750 | |
---|
| 1751 | * sample/hwd.lpm |
---|
| 1752 | A nice example of LP model written in GLPK/L and contributed by |
---|
| 1753 | Peter Lee <plee@kinggee.com.au> was included in the package. |
---|
| 1754 | |
---|
| 1755 | * glplpx6b.c |
---|
| 1756 | The api routine lpx_interior was modified: a) to compute dual |
---|
| 1757 | values for all structural as well as auxiliary variables; b) to |
---|
| 1758 | allow specifying non-zero objective coefficients at auxiliary |
---|
| 1759 | variables. |
---|
| 1760 | |
---|
| 1761 | * sample/glpsol.c |
---|
| 1762 | Three new command-line options were added to the solver, which |
---|
| 1763 | are: --plain, --orig, and --wrlpt. |
---|
| 1764 | |
---|
| 1765 | Mon Oct 14 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1766 | |
---|
| 1767 | * GLPK 3.2.2 has been released. |
---|
| 1768 | |
---|
| 1769 | * glplpt.h, glplpt.c |
---|
| 1770 | A module that reads LP/MIP problem data in CPLEX LP format was |
---|
| 1771 | implemented. |
---|
| 1772 | |
---|
| 1773 | * glplpx8c.c |
---|
| 1774 | An api routine lpx_read_lpt that reads LP/MIP problem data in |
---|
| 1775 | CPLEX LP format was implemented. |
---|
| 1776 | |
---|
| 1777 | * sample/glpsol.c, sample/plan.lpt |
---|
| 1778 | A new command-line option '--lpt' that allows reading LP/MIP |
---|
| 1779 | problem data in CPLEX LP format was added to the solver. |
---|
| 1780 | |
---|
| 1781 | * doc/refman.latex, doc/refman.dvi, doc/refman.ps |
---|
| 1782 | A new edition of the Reference Manual was included. |
---|
| 1783 | |
---|
| 1784 | * source/*.c |
---|
| 1785 | Casting to (unsigned char) was added in some calls to the |
---|
| 1786 | classification functions (isalpha, etc.). The bug was fixed due |
---|
| 1787 | to report provided by Morten Welinder <terra@diku.dk>. |
---|
| 1788 | |
---|
| 1789 | * glplpx8a.c |
---|
| 1790 | The local routine mps_numb used in the routine lpx_write_mps |
---|
| 1791 | was modified to correctly format floating-point numbers that |
---|
| 1792 | have two digits in the decimal exponent. The bug was fixed due |
---|
| 1793 | to report provided by Vlahos Kiriakos <Kiriakos.Vlahos@gs.com>. |
---|
| 1794 | |
---|
| 1795 | * glplan.h, glplan1.c, ..., glplan8.c |
---|
| 1796 | Several serious bugs were fixed in the language processor due |
---|
| 1797 | to reports provided by <NORBERT.PIOTROWSKI@LHSYSTEMS.COM>: |
---|
| 1798 | (a) a static search tree used to find sparse array elements was |
---|
| 1799 | sometimes overwritten that caused the message 'assertion failed' |
---|
| 1800 | to appear; the bug was fixed by creating separate search trees |
---|
| 1801 | in parsing routines; (b) a variable declared using the |
---|
| 1802 | predicate-controlled variable declaration statement had wrong |
---|
| 1803 | order of domain sets, because the variable array was built as |
---|
| 1804 | a copy of the predicate array; the bug was fixed by using the |
---|
| 1805 | internal routine transpose that coordinates mute letters (and |
---|
| 1806 | therefore domain sets) on copying sparse arrays; (c) sometimes |
---|
| 1807 | assignment statements like x[#a,#b,#c] := ... was incorrectly |
---|
| 1808 | processed; the bug was fixed by including an appropriate check |
---|
| 1809 | into the internal routine assign_stmt. |
---|
| 1810 | |
---|
| 1811 | * glp_simplex.c |
---|
| 1812 | An additional check to see if all lower bounds are not greater |
---|
| 1813 | than corresponding upper bounds was included in the routine to |
---|
| 1814 | prevent wrong results to appear. Such incorrectness sometimes |
---|
| 1815 | was not detected, namely, when variables with such bounds were |
---|
| 1816 | non-basic and never entered the basis. |
---|
| 1817 | |
---|
| 1818 | * glpspx1.c |
---|
| 1819 | Maximal number of simplex iterations before reinversion was |
---|
| 1820 | decreased from 100 to 50. This allowed to improve accuracy and, |
---|
| 1821 | that is more important, to reduce the solution time for many |
---|
| 1822 | serial lp problems approximately 1.5--2 times. |
---|
| 1823 | |
---|
| 1824 | * glpspx2.c |
---|
| 1825 | A check to see if all elements in the column chosen to enter |
---|
| 1826 | the basis are close to zero in the routine spx_prim_chuzr was |
---|
| 1827 | temporarily removed because this check gave wrong conclusion in |
---|
| 1828 | case when the corresponding non-basic variable had zero column |
---|
| 1829 | in the constraint matrix. An analogous check to see if all |
---|
| 1830 | elements in the row chosen to leave the basis are close to zero |
---|
| 1831 | in the routine spx_dual_chuzc was also temporarily removed on |
---|
| 1832 | the same reason. The bug was fixed due to reports provided by |
---|
| 1833 | Flavio Keidi Miyazawa <fkm@ic.unicamp.br> and Vlahos Kiriakos |
---|
| 1834 | <Kiriakos.Vlahos@gs.com>. |
---|
| 1835 | |
---|
| 1836 | Mon Aug 12 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1837 | |
---|
| 1838 | * GLPK 3.2.1 has been released. |
---|
| 1839 | |
---|
| 1840 | * glpbcs.h, glpbcs1.c, glpbcs2.c |
---|
| 1841 | * glpies.h, glpies1.c, glpies2.c, glpies3.c |
---|
| 1842 | A preliminary implementation of the branch-and-cut framework |
---|
| 1843 | was included in the package. |
---|
| 1844 | |
---|
| 1845 | * doc/brcut.txt |
---|
| 1846 | The document "GLPK: A Preliminary Implementation of the |
---|
| 1847 | Branch-And-Cut Framework" was included in the distribution. |
---|
| 1848 | |
---|
| 1849 | * sample/tspsol.c |
---|
| 1850 | An illustrative program for solving symmetric TSP based on the |
---|
| 1851 | branch-and-cut method was included in the package. |
---|
| 1852 | |
---|
| 1853 | * glpdmp.h, glpdmp.c |
---|
| 1854 | A new, re-enterable version of routines for managing dynamic |
---|
| 1855 | memory pools was included in the package. |
---|
| 1856 | |
---|
| 1857 | * glpavl.h, glpavl.c |
---|
| 1858 | A new, re-enterable version of routines for managing AVL search |
---|
| 1859 | trees was included in the package. |
---|
| 1860 | |
---|
| 1861 | * glplib.h, glplib2.c |
---|
| 1862 | Two new low-level routines ufopen and ufclose were included in |
---|
| 1863 | the package. |
---|
| 1864 | |
---|
| 1865 | * glplpx.h, glplpx7.c |
---|
| 1866 | The following new api routines were added: lpx_eval_activity, |
---|
| 1867 | lpx_eval_red_cost, lpx_reduce_form, lpx_mixed_gomory. |
---|
| 1868 | |
---|
| 1869 | * glptsp.h, glptsp.c |
---|
| 1870 | A module for reading TSP data using TSPLIB format was included |
---|
| 1871 | in the package. |
---|
| 1872 | |
---|
| 1873 | Mon Jul 15 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1874 | |
---|
| 1875 | * GLPK 3.2 has been released. |
---|
| 1876 | |
---|
| 1877 | * glplpx.h, glplpx1.c, glplpx2.c |
---|
| 1878 | The identifier 'class' (used as a member name in the structure |
---|
| 1879 | LPX and as an argument name in the routine lpx_set_class) was |
---|
| 1880 | changed to 'clss' in order to avoid conflicts with C++ reserved |
---|
| 1881 | words. |
---|
| 1882 | |
---|
| 1883 | * glpk.h, glplpx.h, glplpx1.c, glplpx2.c, glplpx6a.c, |
---|
| 1884 | * glplpx6b.c, glplpx6c.c, glplpx7.c, glplpx8.c |
---|
| 1885 | The following new api routines were added: lpx_set_obj_name, |
---|
| 1886 | lpx_get_obj_name, lpx_get_row_mark, lpx_get_col_mark, |
---|
| 1887 | lpx_transform_row, lpx_transform_col, lpx_prim_ratio_test, |
---|
| 1888 | lpx_dual_ratio_test, lpx_interior, lpx_get_ips_stat, |
---|
| 1889 | lpx_get_ips_row, lpx_get_ips_col, lpx_get_ips_obj, lpx_read_lpm, |
---|
| 1890 | lpx_write_mps, lpx_print_ips. |
---|
| 1891 | |
---|
| 1892 | * glpsol.c |
---|
| 1893 | The solver was completely re-programmed using new api routines. |
---|
| 1894 | |
---|
| 1895 | * lang.latex, lang.dvi, lang.ps |
---|
| 1896 | New edition of the document "GLPK: Modeling Language GLPK/L" |
---|
| 1897 | was included in the distribution. |
---|
| 1898 | |
---|
| 1899 | * refman.latex, refman.dvi, refman.ps |
---|
| 1900 | New edition of the document "GLPK: Reference Manual" (which |
---|
| 1901 | contains descriptions of all new api routines) was included in |
---|
| 1902 | the distribution. |
---|
| 1903 | |
---|
| 1904 | * glpapi.h, glpapi1.c, glpapi2.c, glpapi3.c, glpapi4.c |
---|
| 1905 | These files (which contain old api routines) were removed from |
---|
| 1906 | the package. |
---|
| 1907 | |
---|
| 1908 | * glpipm1.c, glpipm2.c |
---|
| 1909 | The file glpipm1.c was renamed to glpipm.c. The file glpipm2.c |
---|
| 1910 | was used only by old api routines and therefore was removed from |
---|
| 1911 | the package. |
---|
| 1912 | |
---|
| 1913 | * language.texinfo |
---|
| 1914 | Old version of the document "GLPK: Modeling Language GLPK/L" was |
---|
| 1915 | removed from the distribution. |
---|
| 1916 | |
---|
| 1917 | Mon May 27 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1918 | |
---|
| 1919 | * GLPK 3.1 has been released. |
---|
| 1920 | |
---|
| 1921 | * glplpx.h, glplpx1.c, glplpx2.c, glplpx3.c, glplpx4.c, |
---|
| 1922 | * glplpx5.c, glplpx6.c, glplpx7.c, glplpx8.c |
---|
| 1923 | A preliminary implementation of new API routines was completed. |
---|
| 1924 | |
---|
| 1925 | * refman.latex, refman.dvi, refman.ps |
---|
| 1926 | A draft edition of the document "GLPK Reference Manual", which |
---|
| 1927 | describes new API routines, was included. |
---|
| 1928 | |
---|
| 1929 | * glplib3.c |
---|
| 1930 | A bug in measuring long time intervals was fixed up. |
---|
| 1931 | |
---|
| 1932 | * glprsm3.c |
---|
| 1933 | This module contains some obsolete routines not longer used and |
---|
| 1934 | therefore it was removed from the package (into the subdirectory |
---|
| 1935 | 'oldsrc'). |
---|
| 1936 | |
---|
| 1937 | * glprsm.h |
---|
| 1938 | Some declarations related to the module 'glprsm3.c' (see above) |
---|
| 1939 | were removed. |
---|
| 1940 | |
---|
| 1941 | * guide.texinfo |
---|
| 1942 | The document "GLPK User's Guide" describing old API routines was |
---|
| 1943 | removed from the package (into the subdirectory 'oldsrc'). |
---|
| 1944 | |
---|
| 1945 | * newapi.txt |
---|
| 1946 | The document "New GLPK API Routines" was removed at all, because |
---|
| 1947 | it is superseded by the new reference manual (see above). |
---|
| 1948 | |
---|
| 1949 | Mon May 13 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1950 | |
---|
| 1951 | * GLPK 3.0.8 has been released. |
---|
| 1952 | |
---|
| 1953 | * glplpx.h, glplpx1.c, glplpx2.c, glplpx3.c, glplpx4.c, |
---|
| 1954 | * glplpx5.c, glplpx6.c, glplpx7.c |
---|
| 1955 | A preliminary (currently incomplete) implementation of new api |
---|
| 1956 | routines was included. |
---|
| 1957 | |
---|
| 1958 | * sample/newsamp.c |
---|
| 1959 | A sample program for the new api routines was included. |
---|
| 1960 | |
---|
| 1961 | * newapi.txt |
---|
| 1962 | A draft of the document "New GLPK API Routines" was included. |
---|
| 1963 | |
---|
| 1964 | * glpapi2.c, glpapi5.c, glpapi6.c |
---|
| 1965 | These modules (which contain the api routines glp_call_rsm1, |
---|
| 1966 | glp_simplex1, glp_pivot_in, glp_pivot_out) were removed from the |
---|
| 1967 | package (to the subdirectory 'oldsrc') since these routines are |
---|
| 1968 | functionally superseded by the new api routines. |
---|
| 1969 | |
---|
| 1970 | * glpk.h, glpapi2.c, glpapi3.c, glpapi4.c |
---|
| 1971 | The api routines glp_simplex2, glp_call_ipm1, glp_call_bbm1 were |
---|
| 1972 | renamed to glp_simplex, glp_interior, glp_integer, respectively. |
---|
| 1973 | |
---|
| 1974 | * sample/glpsol.c |
---|
| 1975 | Some command-line options (which got obsolete due to the recent |
---|
| 1976 | changes in api) were excluded. |
---|
| 1977 | |
---|
| 1978 | * doc/guide.texinfo |
---|
| 1979 | New edition of the document "GLPK User's Guide" was included in |
---|
| 1980 | the distribution to reflect the changes in some api routines. |
---|
| 1981 | |
---|
| 1982 | * doc/libref.texinfo |
---|
| 1983 | This document was removed from the package (to the subdirectory |
---|
| 1984 | 'oldsrc') since it describes the library routines, most of which |
---|
| 1985 | got obsolete and no longer used. |
---|
| 1986 | |
---|
| 1987 | * Makefile.in |
---|
| 1988 | A minor bug was fixed up due to bug report from Hans Schwengeler |
---|
| 1989 | <Hans.Schwengeler@unibas.ch>. |
---|
| 1990 | |
---|
| 1991 | Mon Apr 22 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 1992 | |
---|
| 1993 | * GLPK 3.0.7 has been released. |
---|
| 1994 | |
---|
| 1995 | * glpduff.h, glpduff.c, glpspx.h, glpspx1.c, glpspx2.c, |
---|
| 1996 | * glpapi7.c |
---|
| 1997 | These modules were replaced by a new implementation of the |
---|
| 1998 | simplex method and therefore they were removed from the package |
---|
| 1999 | (however they still can be found in the subdirectory 'oldsrc'). |
---|
| 2000 | |
---|
| 2001 | * glprsm1.c |
---|
| 2002 | The routine crash_aa was replaced by a new implementation and |
---|
| 2003 | therefore it was removed from the file 'glprsm1.c'. |
---|
| 2004 | |
---|
| 2005 | * glplpx.h, glplpx.c, glpspx.h, glpspx1.c, glpspx2.c, glpspx3.c, |
---|
| 2006 | * glpspx4.c, glpapi7.c |
---|
| 2007 | New (currently incomplete) implementation of the simplex method |
---|
| 2008 | components was included in the package. |
---|
| 2009 | |
---|
| 2010 | Thu Mar 28 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2011 | |
---|
| 2012 | * GLPK 3.0.6 has been released. |
---|
| 2013 | |
---|
| 2014 | * glpluf.h, glpluf.c, glpinv.h, glpinv.c |
---|
| 2015 | New version of LU-factorization and basis maintenance routines |
---|
| 2016 | (based on Forrest-Tomlin updating technique) was implemented. |
---|
| 2017 | |
---|
| 2018 | * glpeta.h, glpeta.c, glpfhv.h, glpfhv.c, glpgel.h, glpgel.c, |
---|
| 2019 | * glppfi.h, glppfi.c, glprfi.h, glprfi.c |
---|
| 2020 | These routines implement some other forms of the basis matrix. |
---|
| 2021 | Now they became obsolete being functionally superseded by the |
---|
| 2022 | new version of basis maintenance routines (see above) and were |
---|
| 2023 | removed from the package (however they still can be found in the |
---|
| 2024 | subdirectory 'oldsrc'). |
---|
| 2025 | |
---|
| 2026 | * glpbbm.c, glprsm.h, glprsm1.h, glprsm2.h, glpspx.h, glpspx2.c, |
---|
| 2027 | * glprsm2.c, glpsol.c |
---|
| 2028 | Necessary changes were made in order to use the new version of |
---|
| 2029 | basis maintenance routines. |
---|
| 2030 | |
---|
| 2031 | Tue Jan 29 12:00:00 2002 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2032 | |
---|
| 2033 | * GLPK 3.0.5 has been released. |
---|
| 2034 | Structure of the package was re-organized in order to simplify |
---|
| 2035 | its maintenance. |
---|
| 2036 | |
---|
| 2037 | * doc/guide.texinfo |
---|
| 2038 | New edition of the document "GLPK User's Guide" was included in |
---|
| 2039 | the distribution. Now the document includes descriptions of some |
---|
| 2040 | additional API routines recently added to the package. |
---|
| 2041 | |
---|
| 2042 | * doc/newapi.txt |
---|
| 2043 | The document "Additional GLPK API Routines" was removed from the |
---|
| 2044 | distribution, because the corresponding material was included in |
---|
| 2045 | the user's guide (see above). |
---|
| 2046 | |
---|
| 2047 | Mon Dec 10 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2048 | |
---|
| 2049 | * GLPK 3.0.4 has been released. |
---|
| 2050 | |
---|
| 2051 | * glpspx.h, glpspx1.c, glpspx2.c, glpapi/glp_simplex2.h |
---|
| 2052 | A new, more efficient version of the two-phase primal simplex |
---|
| 2053 | method was implemented (advanced initial basis, projected |
---|
| 2054 | steepest edge, recursive computations of solution components). |
---|
| 2055 | |
---|
| 2056 | * glpapi/glp_call_bbm1.c |
---|
| 2057 | Now LP relaxation can be solved either using rsm1_driver(), or |
---|
| 2058 | using glp_simplex2(). The choice is controlled by the parameter |
---|
| 2059 | 'meth' (a member of struct bbm1). |
---|
| 2060 | |
---|
| 2061 | * sample/glpsol.c |
---|
| 2062 | The new implementation of the simplex method is now used by |
---|
| 2063 | default. The old version is available via --old-sim option. |
---|
| 2064 | |
---|
| 2065 | * glpmat/gm_scaling.c |
---|
| 2066 | Now this routine displays only two lines: an initial "quality" |
---|
| 2067 | and a final "quality". |
---|
| 2068 | |
---|
| 2069 | * glplp/prepro_lp.c |
---|
| 2070 | Identifiers 'fmin' and 'fmax' renamed to 'f_min' and 'f_max' in |
---|
| 2071 | order to avoid conflict with <math.h>. The bug was fixed due to |
---|
| 2072 | report provided by Sami Farin <sfarin@ratol.fi>. |
---|
| 2073 | |
---|
| 2074 | Wed Oct 03 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2075 | |
---|
| 2076 | * GLPK 3.0.3 has been released. |
---|
| 2077 | |
---|
| 2078 | * glprsm/harris_row.c, glprsm/harris_col.c |
---|
| 2079 | The relative tolerance used on the first pass of the two-pass |
---|
| 2080 | ratio test was replaced by the absolute tolerance. |
---|
| 2081 | |
---|
| 2082 | * glprsm/rsm_primal.c, glprsm/rsm_feas.c, glprsm/rsm_dual.c |
---|
| 2083 | The absolute tolerance passed to the two-pass ratio test routine |
---|
| 2084 | was decaresed (for both primal and dual simplex). |
---|
| 2085 | |
---|
| 2086 | These changes were made in order to improve numerical stability |
---|
| 2087 | of the simplex method. |
---|
| 2088 | |
---|
| 2089 | * glprsm/glp_call_rsm1.c, glprsm/glp_call_bbm1.c, |
---|
| 2090 | * glprsm/glp_simplex1, glprsm/glp_pivoting.c |
---|
| 2091 | Default form of the inverse was changed from RFI to AFI. |
---|
| 2092 | |
---|
| 2093 | Mon Sep 24 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2094 | |
---|
| 2095 | * GLPK 3.0.2 has been released. |
---|
| 2096 | |
---|
| 2097 | * glpfhv.h, glpfhv.c |
---|
| 2098 | New version of the basis maintaining routines was implemented. |
---|
| 2099 | These routines, which are based on so called FHV-factorization |
---|
| 2100 | (a variety of LU-factorization) and Gustavson's data structures, |
---|
| 2101 | perform the main operations on the basis matrix faster at the |
---|
| 2102 | expense of some worsening numerical accuracy. |
---|
| 2103 | |
---|
| 2104 | * glprsm.h, glprsm/afi.c |
---|
| 2105 | The routines, which implement AFI (Advanced Form of the |
---|
| 2106 | Inverse) based on FHV-factorization, were added to the package. |
---|
| 2107 | This new form is available via the parameter form = 3 (on API |
---|
| 2108 | level) or via the option --afi (in GLPSOL solver). |
---|
| 2109 | |
---|
| 2110 | * EFI was renamed to PFI |
---|
| 2111 | In order to correct terminology the acronym EFI (Elimination |
---|
| 2112 | Form of the Inverse) was replaced by PFI (Product Form of the |
---|
| 2113 | Inverse) everywhere in the source code and the documentation. |
---|
| 2114 | |
---|
| 2115 | * glpset/umalloc.c, glpset/ucalloc.c |
---|
| 2116 | * glpset/get_atom.c, glpset/get_atomv.c |
---|
| 2117 | These memory management routines were changed in order *not* to |
---|
| 2118 | clear allocated memory blocks by binary zeros. |
---|
| 2119 | |
---|
| 2120 | Wed Aug 01 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2121 | |
---|
| 2122 | * GLPK 3.0.1 has been released. |
---|
| 2123 | |
---|
| 2124 | * glpapi/old_api.c, glplp/extract_lp.c, store_lpsol.c |
---|
| 2125 | Old API routines were deleted from the package. |
---|
| 2126 | |
---|
| 2127 | * include/glpk.h, include/glpapi.h, include/glplp.h |
---|
| 2128 | Specifications of old API routines and data structures were |
---|
| 2129 | removed from the headers. |
---|
| 2130 | |
---|
| 2131 | * sample/glpsol.c |
---|
| 2132 | New version of the stand-alone solver GLPSOL that now uses new |
---|
| 2133 | API routines was implemented. |
---|
| 2134 | |
---|
| 2135 | * glpapi/glp_set_row_fctr.c, glpapi/glp_set_col_fctr.c, |
---|
| 2136 | * glpapi/glp_get_row_fctr.c, glpapi/glp_get_col_fctr.c, |
---|
| 2137 | * glpapi/glp_scale_prob.c |
---|
| 2138 | Scaling routines were added. |
---|
| 2139 | |
---|
| 2140 | * glpapi/glp_write_mps.c |
---|
| 2141 | The routine for writing problem data in MPS format was added. |
---|
| 2142 | |
---|
| 2143 | * glpapi/glp_simplex1.c |
---|
| 2144 | Comprehensive driver to the simplex method was added. |
---|
| 2145 | |
---|
| 2146 | * glpapi/glp_pivoting.c |
---|
| 2147 | The routines glp_pivot_in() and glp_pivot_out() intended for |
---|
| 2148 | basis maintaining were added. |
---|
| 2149 | |
---|
| 2150 | * glprsm/create_rsm.c, glprsm/delete_rsm.c, glprsm/scale_rsm.c, |
---|
| 2151 | * glprsm/build_basis.c |
---|
| 2152 | Additional low level routines related to the simplex method |
---|
| 2153 | were added. |
---|
| 2154 | |
---|
| 2155 | * glpk.h, glpapi.h, glprsm.h |
---|
| 2156 | Additional specifications for new routines and data structures |
---|
| 2157 | were added. |
---|
| 2158 | |
---|
| 2159 | * sample/lpglpk30.c |
---|
| 2160 | A non-trivial example was added. It allows using GLPK as a base |
---|
| 2161 | LP solver for Concorde, a program for solving Traveling Salesman |
---|
| 2162 | Problem (TSP). For details see comments in 'lpglpk30.c'. |
---|
| 2163 | |
---|
| 2164 | * doc/newapi.txt |
---|
| 2165 | The document "Additional GLPK API Routines" that describes some |
---|
| 2166 | new API routines was included. |
---|
| 2167 | |
---|
| 2168 | Thu Jul 19 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2169 | |
---|
| 2170 | * GLPK 3.0 has been released. |
---|
| 2171 | |
---|
| 2172 | Now GLPK is provided with new API, which is intended for using |
---|
| 2173 | the package in more complex algorithmic schemes. |
---|
| 2174 | |
---|
| 2175 | * glpapi/old_api.c |
---|
| 2176 | All routines related to old API were gathered in one file named |
---|
| 2177 | 'old_api.c'. |
---|
| 2178 | |
---|
| 2179 | * glpapi/*.c |
---|
| 2180 | These routines that implement new API were added to the package. |
---|
| 2181 | |
---|
| 2182 | * include/glpk.h, include/glpapi.h |
---|
| 2183 | Specifications of new API routines and data structures were |
---|
| 2184 | added to these headers. Specifications of old API routines and |
---|
| 2185 | data structures were locked by #ifdef GLP_OLD_API directive. |
---|
| 2186 | |
---|
| 2187 | * doc/guide.texinfo |
---|
| 2188 | New edition of the document "GLPK User's Guide" that correspond |
---|
| 2189 | to new API was included. |
---|
| 2190 | |
---|
| 2191 | Thu Jun 14 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2192 | |
---|
| 2193 | * GLPK 2.4.1 has been released. |
---|
| 2194 | |
---|
| 2195 | * doc/glpk_ml.texinfo |
---|
| 2196 | The new document "Modeling Language GLPK/L" was included. |
---|
| 2197 | |
---|
| 2198 | * doc/glpk_ug.texinfo |
---|
| 2199 | New edition of the document "GLPK User's Guide" was included. |
---|
| 2200 | |
---|
| 2201 | * doc/language.txt |
---|
| 2202 | The preliminary document "GLPK/L Modeling Language: A Brief |
---|
| 2203 | description" was removed from the distribution, because it has |
---|
| 2204 | been replaced by the new document "Modeling Language GLPK/L". |
---|
| 2205 | |
---|
| 2206 | * glplang/l_spar.c |
---|
| 2207 | The routine comparison() was re-programmed in order to |
---|
| 2208 | implement the relation operation as specified in the language |
---|
| 2209 | description. |
---|
| 2210 | |
---|
| 2211 | * glpmip.h, glpmip/*.c |
---|
| 2212 | The partition 'glpmip' was renamed to 'glpbbm'. |
---|
| 2213 | |
---|
| 2214 | Thu May 10 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2215 | |
---|
| 2216 | * GLPK 2.4 has been released. |
---|
| 2217 | |
---|
| 2218 | Now GLPK includes an implementation of a preliminary version of |
---|
| 2219 | the GLPK/L modeling language. |
---|
| 2220 | |
---|
| 2221 | * glplang.h, glplang/*.c |
---|
| 2222 | The header 'glplang.h' and a set of routines that implements |
---|
| 2223 | the GLPK/L language processor (the partition 'glplang') were |
---|
| 2224 | added to the package. |
---|
| 2225 | |
---|
| 2226 | * doc/language.txt |
---|
| 2227 | The document "GLPK/L Modeling Language: A Brief Description |
---|
| 2228 | (Supplement to GLPK User's Guide)" in plain text format was |
---|
| 2229 | included in the package (see the file 'language.txt' in the |
---|
| 2230 | subdirectory 'doc' of the distribution). |
---|
| 2231 | |
---|
| 2232 | * ex/model1.lpm, ex/model2.lpm |
---|
| 2233 | Two examples of model descriptions written in GLPK/L were added |
---|
| 2234 | to the package. |
---|
| 2235 | |
---|
| 2236 | * sample/glpsol.c |
---|
| 2237 | This program was modified in order: a) to allow processing |
---|
| 2238 | model description written in GLPK/L; b) to allow solving pure |
---|
| 2239 | LP problem using the interior point method. |
---|
| 2240 | |
---|
| 2241 | * sample/glpipm.c |
---|
| 2242 | This program was removed from the package, because its function |
---|
| 2243 | was passed to the GLPSOL solver. |
---|
| 2244 | |
---|
| 2245 | * Makefile.in |
---|
| 2246 | This file was changed in order to install the GLPSOL solver |
---|
| 2247 | executable. |
---|
| 2248 | |
---|
| 2249 | Mon Apr 09 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2250 | |
---|
| 2251 | * GLPK 2.3 has been released. |
---|
| 2252 | |
---|
| 2253 | * glpmip.h, glpmip/*.c |
---|
| 2254 | These routines (that implement the branch-and-bound method) were |
---|
| 2255 | re-programmed in order to improve robustness of implementation. |
---|
| 2256 | In particular, heuristic routines were carried out from the main |
---|
| 2257 | driver routine. |
---|
| 2258 | |
---|
| 2259 | Additional GLPK API routines were documented. |
---|
| 2260 | |
---|
| 2261 | New edition of the document "GLPK User's Guide" was included in |
---|
| 2262 | the package. |
---|
| 2263 | |
---|
| 2264 | The preliminary document "Mixed Integer Programming Using GLPK |
---|
| 2265 | Version 2.2 (Supplement to GLPK User's Guide)" was removed from |
---|
| 2266 | the package, because this material was included in GLPK User's |
---|
| 2267 | Guide. |
---|
| 2268 | |
---|
| 2269 | Thu Mar 15 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2270 | |
---|
| 2271 | * GLPK 2.2 has been released. |
---|
| 2272 | |
---|
| 2273 | Now GLPK includes a tentative implementation of the |
---|
| 2274 | branch-and-bound procedure based on the dual simplex method for |
---|
| 2275 | mixed integer linear programming (MIP). |
---|
| 2276 | |
---|
| 2277 | The preliminary document "Mixed Integer Programming Using GLPK |
---|
| 2278 | Version 2.2 (Supplement to GLPK User's Guide)" was included into |
---|
| 2279 | the package in plain text format (see the file 'mip.txt' in the |
---|
| 2280 | subdirectory 'doc' of the distribution). |
---|
| 2281 | |
---|
| 2282 | * glpmip.h, glpmip/*.c, glpapi/glp_integer.c |
---|
| 2283 | These routines (that implement the branch-and-bound method) were |
---|
| 2284 | added to the package. |
---|
| 2285 | |
---|
| 2286 | * sample/glpsol.c |
---|
| 2287 | This program was modified in order to allow solving LP and MIP |
---|
| 2288 | problems. |
---|
| 2289 | |
---|
| 2290 | * glprsm/rsm_primal.c, glprsm/rsm_dual.c, glprsm/rsm_feas.c, |
---|
| 2291 | * glprsm/rsm1_driver.c |
---|
| 2292 | These routines (which are drivers to basic components of the |
---|
| 2293 | revised simplex method) were added to the package. |
---|
| 2294 | |
---|
| 2295 | Mon Feb 19 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2296 | |
---|
| 2297 | * GLPK 2.1 has been released. |
---|
| 2298 | |
---|
| 2299 | * glprsm.h, glprsm/*.c |
---|
| 2300 | These routines (that implement components of the revised simplex |
---|
| 2301 | method) were re-programmed and documented. |
---|
| 2302 | |
---|
| 2303 | The document "GLPK Implementation of the Revised Simplex Method" |
---|
| 2304 | was included into the package. |
---|
| 2305 | |
---|
| 2306 | Thu Jan 25 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2307 | |
---|
| 2308 | * GLPK 2.0 has been released. |
---|
| 2309 | |
---|
| 2310 | Now GLPK includes a tentative implementation of the primal-dual |
---|
| 2311 | interior point method for large-scale linear programming (for |
---|
| 2312 | more details see the file `NEWS' in the distribution). A number |
---|
| 2313 | of routines related to the interior point method were added to |
---|
| 2314 | the package. |
---|
| 2315 | |
---|
| 2316 | * insist.c |
---|
| 2317 | The routine `insist' and the macro of the same name were |
---|
| 2318 | introduced into the package in order to replace the standard |
---|
| 2319 | macro `assert'. Some routines require the expression specified |
---|
| 2320 | in the `assert' macro to be evaluated, but compiling the package |
---|
| 2321 | with NDEBUG option prevents from that. This bug was fixed due to |
---|
| 2322 | bug report provided by Peter A. Huegler <phuegler@bsco.com>. |
---|
| 2323 | |
---|
| 2324 | * Makefile.in |
---|
| 2325 | Minor bug was fixed due to a patch provided by Alexandre Oliva |
---|
| 2326 | <oliva@lsd.ic.unicamp.br>. |
---|
| 2327 | |
---|
| 2328 | Wed Jan 10 12:00:00 2001 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2329 | |
---|
| 2330 | * GLPK 1.1.2 has been released. |
---|
| 2331 | |
---|
| 2332 | * umalloc.c, ufree.c, create_pool.c, get_atom.c, get_atomv.c |
---|
| 2333 | These routines were changed in order to fix a bug due to |
---|
| 2334 | report provided by Andrew Hood <ajhood@fl.net.au>. Because of |
---|
| 2335 | this bug data alignment error occured on the Sparc computer. |
---|
| 2336 | |
---|
| 2337 | Tue Dec 14 12:00:00 2000 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2338 | |
---|
| 2339 | * GLPK 1.1.1 has been released. |
---|
| 2340 | |
---|
| 2341 | Minor bug was fixed in `Makefile.in'. |
---|
| 2342 | |
---|
| 2343 | GLPK Library Reference was included. |
---|
| 2344 | |
---|
| 2345 | Mon Nov 27 12:00:00 2000 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2346 | |
---|
| 2347 | * GLPK 1.1 has been released. |
---|
| 2348 | |
---|
| 2349 | Minor changes were made in order to co-ordinate GLPK routines |
---|
| 2350 | and their descriptions. |
---|
| 2351 | |
---|
| 2352 | GLPK User's Guide was included. |
---|
| 2353 | |
---|
| 2354 | Fri Oct 20 12:00:00 2000 Andrew Makhorin <mao@mai2.rcnet.ru> |
---|
| 2355 | |
---|
| 2356 | * GLPK 1.0 has been released. |
---|