lemon/lp_base.cc
author Peter Kovacs <kpeter@inf.elte.hu>
Fri, 13 Nov 2009 00:10:33 +0100
changeset 815 aef153f430e1
parent 459 ed54c0d13df0
child 877 141f9c0db4a3
permissions -rw-r--r--
Entirely rework cycle canceling algorithms (#180)

- Move the cycle canceling algorithms (CycleCanceling, CancelAndTighten)
into one class (CycleCanceling).
- Add a Method parameter to the run() function to be able to select
the used cycle canceling method.
- Use the new interface similarly to NetworkSimplex.
- Rework the implementations using an efficient internal structure
for handling the residual network.
This improvement made the codes much faster.
- Handle GEQ supply type (LEQ is not supported).
- Handle infinite upper bounds.
- Handle negative costs (for arcs of finite upper bound).
- Extend the documentation.
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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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///\file
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///\brief The implementation of the LP solver interface.
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#include <lemon/lp_base.h>
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namespace lemon {
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  const LpBase::Value LpBase::INF =
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    std::numeric_limits<LpBase::Value>::infinity();
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  const LpBase::Value LpBase::NaN =
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    std::numeric_limits<LpBase::Value>::quiet_NaN();
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} //namespace lemon