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CoinPresolveDoubleton.hpp
Go to the documentation of this file.
1 /* $Id: CoinPresolveDoubleton.hpp 2083 2019-01-06 19:38:09Z unxusr $ */
2 // Copyright (C) 2002, International Business Machines
3 // Corporation and others. All Rights Reserved.
4 // This code is licensed under the terms of the Eclipse Public License (EPL).
5
6 #ifndef CoinPresolveDoubleton_H
7 #define CoinPresolveDoubleton_H
8
9 #define DOUBLETON 5
10
26 class doubleton_action : public CoinPresolveAction {
27 public:
28 struct action {
29
30 double clox;
31 double cupx;
32 double costx;
33
34 double costy;
35
36 double rlo;
37
38 double coeffx;
39 double coeffy;
40
41 double *colel;
42
43 int icolx;
44 int icoly;
45 int row;
46 int ncolx;
47 int ncoly;
48 };
49
50 const int nactions_;
51 const action *const actions_;
52
53 private:
54 doubleton_action(int nactions,
55 const action *actions,
56 const CoinPresolveAction *next)
57 : CoinPresolveAction(next)
58 , nactions_(nactions)
59 , actions_(actions)
60 {
61 }
62
63 public:
64 const char *name() const { return ("doubleton_action"); }
65
66 static const CoinPresolveAction *presolve(CoinPresolveMatrix *,
67 const CoinPresolveAction *next);
68
69 void postsolve(CoinPostsolveMatrix *prob) const;
70
71 virtual ~doubleton_action();
72 };
73 #endif
74
75 /* vi: softtabstop=2 shiftwidth=2 expandtab tabstop=2
76 */
doubleton_action::action::rlo
double rlo
Definition: CoinPresolveDoubleton.hpp:36
doubleton_action::action::cupx
double cupx
Definition: CoinPresolveDoubleton.hpp:31
doubleton_action::postsolve
void postsolve(CoinPostsolveMatrix *prob) const
Apply the postsolve transformation for this particular presolve action.
CoinPresolveAction
Abstract base class of all presolve routines.
Definition: CoinPresolveMatrix.hpp:163
doubleton_action::name
const char * name() const
A name for debug printing.
Definition: CoinPresolveDoubleton.hpp:64
doubleton_action::actions_
const action *const actions_
Definition: CoinPresolveDoubleton.hpp:51
doubleton_action::action::clox
double clox
Definition: CoinPresolveDoubleton.hpp:30
doubleton_action::presolve
static const CoinPresolveAction * presolve(CoinPresolveMatrix *, const CoinPresolveAction *next)
doubleton_action::action::row
int row
Definition: CoinPresolveDoubleton.hpp:45
doubleton_action
Solve ax+by=c for y and substitute y out of the problem.
Definition: CoinPresolveDoubleton.hpp:26
doubleton_action::action
Definition: CoinPresolveDoubleton.hpp:28
doubleton_action::action::ncolx
int ncolx
Definition: CoinPresolveDoubleton.hpp:46
doubleton_action::action::icolx
int icolx
Definition: CoinPresolveDoubleton.hpp:43
CoinPresolveAction::next
const CoinPresolveAction * next
The next presolve transformation.
Definition: CoinPresolveMatrix.hpp:180
CoinPostsolveMatrix
Augments CoinPrePostsolveMatrix with information about the problem that is only needed during postsol...
Definition: CoinPresolveMatrix.hpp:1552
doubleton_action::action::costy
double costy
Definition: CoinPresolveDoubleton.hpp:34
doubleton_action::action::coeffx
double coeffx
Definition: CoinPresolveDoubleton.hpp:38
CoinPresolveMatrix
Augments CoinPrePostsolveMatrix with information about the problem that is only needed during presolv...
Definition: CoinPresolveMatrix.hpp:905
doubleton_action::action::colel
double * colel
Definition: CoinPresolveDoubleton.hpp:41
doubleton_action::doubleton_action
doubleton_action(int nactions, const action *actions, const CoinPresolveAction *next)
Definition: CoinPresolveDoubleton.hpp:54
doubleton_action::action::ncoly
int ncoly
Definition: CoinPresolveDoubleton.hpp:47
doubleton_action::action::coeffy
double coeffy
Definition: CoinPresolveDoubleton.hpp:39
doubleton_action::action::icoly
int icoly
Definition: CoinPresolveDoubleton.hpp:44
doubleton_action::action::costx
double costx
Definition: CoinPresolveDoubleton.hpp:32
doubleton_action::~doubleton_action
virtual ~doubleton_action()
doubleton_action::nactions_
const int nactions_
Definition: CoinPresolveDoubleton.hpp:50