Location: LEMON/LEMON-main/lemon/lp_base.cc - annotation
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kpeter (Peter Kovacs)
Support real types + numerical stability fix in NS (#254)
- Real types are supported by appropriate inicialization.
- A feature of the XTI spanning tree structure is removed to ensure
numerical stability (could cause problems using integer types).
The node potentials are updated always on the lower subtree,
in order to prevent overflow problems.
The former method isn't notably faster during to our tests.
r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r458:7afc121e0689 r486:bc0a130bbb46 r486:bc0a130bbb46 r486:bc0a130bbb46 r486:bc0a130bbb46 r458:7afc121e0689 r458:7afc121e0689 | /* -*- mode: C++; indent-tabs-mode: nil; -*-
*
* This file is a part of LEMON, a generic C++ optimization library.
*
* Copyright (C) 2003-2008
* Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
* (Egervary Research Group on Combinatorial Optimization, EGRES).
*
* Permission to use, modify and distribute this software is granted
* provided that this copyright notice appears in all copies. For
* precise terms see the accompanying LICENSE file.
*
* This software is provided "AS IS" with no warranty of any kind,
* express or implied, and with no claim as to its suitability for any
* purpose.
*
*/
///\file
///\brief The implementation of the LP solver interface.
#include <lemon/lp_base.h>
namespace lemon {
const LpBase::Value LpBase::INF =
std::numeric_limits<LpBase::Value>::infinity();
const LpBase::Value LpBase::NaN =
std::numeric_limits<LpBase::Value>::quiet_NaN();
} //namespace lemon
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