lemon/base.cc
author Peter Kovacs <kpeter@inf.elte.hu>
Tue, 24 Mar 2009 00:18:25 +0100
changeset 596 8c3112a66878
parent 440 88ed40ad0d4f
permissions -rw-r--r--
Use XTI implementation instead of ATI in NetworkSimplex (#234)

XTI (eXtended Threaded Index) is an imporved version of the widely
known ATI (Augmented Threaded Index) method for storing and updating
the spanning tree structure in Network Simplex algorithms.

In the ATI data structure three indices are stored for each node:
predecessor, thread and depth. In the XTI data structure depth is
replaced by the number of successors and the last successor
(according to the thread index).
alpar@209
     1
/* -*- mode: C++; indent-tabs-mode: nil; -*-
alpar@7
     2
 *
alpar@209
     3
 * This file is a part of LEMON, a generic C++ optimization library.
alpar@7
     4
 *
alpar@440
     5
 * Copyright (C) 2003-2009
alpar@7
     6
 * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
alpar@7
     7
 * (Egervary Research Group on Combinatorial Optimization, EGRES).
alpar@7
     8
 *
alpar@7
     9
 * Permission to use, modify and distribute this software is granted
alpar@7
    10
 * provided that this copyright notice appears in all copies. For
alpar@7
    11
 * precise terms see the accompanying LICENSE file.
alpar@7
    12
 *
alpar@7
    13
 * This software is provided "AS IS" with no warranty of any kind,
alpar@7
    14
 * express or implied, and with no claim as to its suitability for any
alpar@7
    15
 * purpose.
alpar@7
    16
 *
alpar@7
    17
 */
alpar@7
    18
alpar@7
    19
///\file
kpeter@49
    20
///\brief Some basic non-inline functions and static global data.
alpar@7
    21
alpar@7
    22
#include<lemon/tolerance.h>
deba@220
    23
#include<lemon/core.h>
alpar@7
    24
namespace lemon {
alpar@7
    25
alpar@477
    26
  float Tolerance<float>::def_epsilon = static_cast<float>(1e-4);
alpar@7
    27
  double Tolerance<double>::def_epsilon = 1e-10;
alpar@7
    28
  long double Tolerance<long double>::def_epsilon = 1e-14;
alpar@7
    29
alpar@7
    30
#ifndef LEMON_ONLY_TEMPLATES
alpar@7
    31
  const Invalid INVALID = Invalid();
alpar@7
    32
#endif
alpar@7
    33
alpar@7
    34
} //namespace lemon