NEWS
author Peter Kovacs <kpeter@inf.elte.hu>
Thu, 12 Nov 2009 23:26:13 +0100
changeset 806 fa6f37d7a25b
parent 496 4f3ea453eb90
child 881 87569cb5734d
permissions -rw-r--r--
Entirely rework CapacityScaling (#180)

- Use the new interface similarly to NetworkSimplex.
- Rework the implementation using an efficient internal structure
for handling the residual network. This improvement made the
code much faster (up to 2-5 times faster on large graphs).
- Handle GEQ supply type (LEQ is not supported).
- Handle negative costs for arcs of finite capacity.
(Note that this algorithm cannot handle arcs of negative cost
and infinite upper bound, thus it returns UNBOUNDED if such
an arc exists.)
- Extend the documentation.
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2009-05-13 Version 1.1 released
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        This is the second stable release of the 1.x series. It
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        features a better coverage of the tools available in the 0.x
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        series, a thoroughly reworked LP/MIP interface plus various
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        improvements in the existing tools.
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        * Much improved M$ Windows support
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          * Various improvements in the CMAKE build system
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          * Compilation warnings are fixed/suppressed
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        * Support IBM xlC compiler
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        * New algorithms
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          * Connectivity related algorithms (#61)
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          * Euler walks (#65)
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          * Preflow push-relabel max. flow algorithm (#176)
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          * Circulation algorithm (push-relabel based) (#175)
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          * Suurballe algorithm (#47)
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          * Gomory-Hu algorithm (#66)
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          * Hao-Orlin algorithm (#58)
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          * Edmond's maximum cardinality and weighted matching algorithms
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            in general graphs (#48,#265)
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          * Minimum cost arborescence/branching (#60)
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          * Network Simplex min. cost flow algorithm (#234)
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        * New data structures
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          * Full graph structure (#57)
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          * Grid graph structure (#57)
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          * Hypercube graph structure (#57)
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          * Graph adaptors (#67)
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          * ArcSet and EdgeSet classes (#67)
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          * Elevator class (#174)
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        * Other new tools
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          * LP/MIP interface (#44)
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            * Support for GLPK, CPLEX, Soplex, COIN-OR CLP and CBC
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          * Reader for the Nauty file format (#55)
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          * DIMACS readers (#167)
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          * Radix sort algorithms (#72)
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          * RangeIdMap and CrossRefMap (#160)
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        * New command line tools
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          * DIMACS to LGF converter (#182)
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          * lgf-gen - a graph generator (#45)
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          * DIMACS solver utility (#226)
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        * Other code improvements
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          * Lognormal distribution added to Random (#102)
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          * Better (i.e. O(1) time) item counting in SmartGraph (#3)
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          * The standard maps of graphs are guaranteed to be
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            reference maps (#190)
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        * Miscellaneous
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          * Various doc improvements
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          * Improved 0.x -> 1.x converter script
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        * Several bugfixes (compared to release 1.0):
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          #170: Bugfix SmartDigraph::split()
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          #171: Bugfix in SmartGraph::restoreSnapshot()
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          #172: Extended test cases for graphs and digraphs
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          #173: Bugfix in Random
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                * operator()s always return a double now
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                * the faulty real<Num>(Num) and real<Num>(Num,Num)
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                  have been removed
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          #187: Remove DijkstraWidestPathOperationTraits
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          #61:  Bugfix in DfsVisit
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          #193: Bugfix in GraphReader::skipSection()
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          #195: Bugfix in ConEdgeIt()
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          #197: Bugfix in heap unionfind
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                * This bug affects Edmond's general matching algorithms
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          #207: Fix 'make install' without 'make html' using CMAKE
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          #208: Suppress or fix VS2008 compilation warnings
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          ----: Update the LEMON icon
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          ----: Enable the component-based installer
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                (in installers made by CPACK)
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          ----: Set the proper version for CMAKE in the tarballs
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                (made by autotools)
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          ----: Minor clarification in the LICENSE file
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          ----: Add missing unistd.h include to time_measure.h
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          #204: Compilation bug fixed in graph_to_eps.h with VS2005
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          #214,#215: windows.h should never be included by lemon headers
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          #230: Build systems check the availability of 'long long' type
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          #229: Default implementation of Tolerance<> is used for integer types
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          #211,#212: Various fixes for compiling on AIX
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          ----: Improvements in CMAKE config
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                - docs is installed in share/doc/
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                - detects newer versions of Ghostscript
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          #239: Fix missing 'inline' specifier in time_measure.h
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          #274,#280: Install lemon/config.h
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          #275: Prefix macro names with LEMON_ in lemon/config.h
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          ----: Small script for making the release tarballs added
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          ----: Minor improvement in unify-sources.sh (a76f55d7d397)
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2009-03-27 LEMON joins to the COIN-OR initiative
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        COIN-OR (Computational Infrastructure for Operations Research,
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        http://www.coin-or.org) project is an initiative to spur the
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        development of open-source software for the operations research
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        community.
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2008-10-13 Version 1.0 released
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	This is the first stable release of LEMON. Compared to the 0.x
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	release series, it features a considerably smaller but more
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	matured set of tools. The API has also completely revised and
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	changed in several places.
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	* The major name changes compared to the 0.x series (see the
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          Migration Guide in the doc for more details)
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          * Graph -> Digraph, UGraph -> Graph
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          * Edge -> Arc, UEdge -> Edge
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	  * source(UEdge)/target(UEdge) -> u(Edge)/v(Edge)
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	* Other improvements
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	  * Better documentation
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	  * Reviewed and cleaned up codebase
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	  * CMake based build system (along with the autotools based one)
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	* Contents of the library (ported from 0.x)
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	  * Algorithms
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       	    * breadth-first search (bfs.h)
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       	    * depth-first search (dfs.h)
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       	    * Dijkstra's algorithm (dijkstra.h)
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       	    * Kruskal's algorithm (kruskal.h)
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    	  * Data structures
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       	    * graph data structures (list_graph.h, smart_graph.h)
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       	    * path data structures (path.h)
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       	    * binary heap data structure (bin_heap.h)
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       	    * union-find data structures (unionfind.h)
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       	    * miscellaneous property maps (maps.h)
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       	    * two dimensional vector and bounding box (dim2.h)
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          * Concepts
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       	    * graph structure concepts (concepts/digraph.h, concepts/graph.h,
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              concepts/graph_components.h)
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       	    * concepts for other structures (concepts/heap.h, concepts/maps.h,
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	      concepts/path.h)
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    	  * Tools
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       	    * Mersenne twister random number generator (random.h)
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       	    * tools for measuring cpu and wall clock time (time_measure.h)
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       	    * tools for counting steps and events (counter.h)
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       	    * tool for parsing command line arguments (arg_parser.h)
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       	    * tool for visualizing graphs (graph_to_eps.h)
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       	    * tools for reading and writing data in LEMON Graph Format
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              (lgf_reader.h, lgf_writer.h)
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            * tools to handle the anomalies of calculations with
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	      floating point numbers (tolerance.h)
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            * tools to manage RGB colors (color.h)
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    	  * Infrastructure
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       	    * extended assertion handling (assert.h)
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       	    * exception classes and error handling (error.h)
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      	    * concept checking (concept_check.h)
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       	    * commonly used mathematical constants (math.h)