lemon/lp.h
author Peter Kovacs <kpeter@inf.elte.hu>
Fri, 17 Apr 2009 18:04:36 +0200
changeset 609 e6927fe719e6
parent 461 08d495d48089
child 627 20dac2104519
permissions -rw-r--r--
Support >= and <= constraints in NetworkSimplex (#219, #234)

By default the same inequality constraints are supported as by
Circulation (the GEQ form), but the LEQ form can also be selected
using the problemType() function.

The documentation of the min. cost flow module is reworked and
extended with important notes and explanations about the different
variants of the problem and about the dual solution and optimality
conditions.
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/* -*- mode: C++; indent-tabs-mode: nil; -*-
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 *
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 * This file is a part of LEMON, a generic C++ optimization library.
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 *
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 * Copyright (C) 2003-2008
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 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
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 * (Egervary Research Group on Combinatorial Optimization, EGRES).
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 *
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 * Permission to use, modify and distribute this software is granted
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 * provided that this copyright notice appears in all copies. For
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 * precise terms see the accompanying LICENSE file.
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 *
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 * This software is provided "AS IS" with no warranty of any kind,
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 * express or implied, and with no claim as to its suitability for any
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 * purpose.
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 *
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 */
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#ifndef LEMON_LP_H
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#define LEMON_LP_H
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#include<lemon/config.h>
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#ifdef HAVE_GLPK
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#include <lemon/glpk.h>
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#elif HAVE_CPLEX
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#include <lemon/cplex.h>
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#elif HAVE_SOPLEX
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#include <lemon/soplex.h>
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#elif HAVE_CLP
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#include <lemon/clp.h>
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#endif
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///\file
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///\brief Defines a default LP solver
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///\ingroup lp_group
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namespace lemon {
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#ifdef DOXYGEN
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  ///The default LP solver identifier
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  ///The default LP solver identifier.
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  ///\ingroup lp_group
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  ///
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  ///Currently, the possible values are \c GLPK, \c CPLEX,
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  ///\c SOPLEX or \c CLP
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#define LEMON_DEFAULT_LP SOLVER
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  ///The default LP solver
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  ///The default LP solver.
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  ///\ingroup lp_group
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  ///
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  ///Currently, it is either \c GlpkLp, \c CplexLp, \c SoplexLp or \c ClpLp
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  typedef GlpkLp Lp;
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  ///The default MIP solver identifier
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  ///The default MIP solver identifier.
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  ///\ingroup lp_group
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  ///
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  ///Currently, the possible values are \c GLPK or \c CPLEX
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#define LEMON_DEFAULT_MIP SOLVER
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  ///The default MIP solver.
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  ///The default MIP solver.
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  ///\ingroup lp_group
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  ///
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  ///Currently, it is either \c GlpkMip or \c CplexMip
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  typedef GlpkMip Mip;
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#else
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#ifdef HAVE_GLPK
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# define LEMON_DEFAULT_LP GLPK
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  typedef GlpkLp Lp;
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# define LEMON_DEFAULT_MIP GLPK
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  typedef GlpkMip Mip;
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#elif HAVE_CPLEX
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# define LEMON_DEFAULT_LP CPLEX
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  typedef CplexLp Lp;
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# define LEMON_DEFAULT_MIP CPLEX
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  typedef CplexMip Mip;
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#elif HAVE_SOPLEX
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# define DEFAULT_LP SOPLEX
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  typedef SoplexLp Lp;
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#elif HAVE_CLP
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# define DEFAULT_LP CLP
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  typedef ClpLp Lp;  
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#endif
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#endif
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} //namespace lemon
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#endif //LEMON_LP_H