Cbc  2.9.9
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CoinPresolveDual.hpp
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1 /* $Id: CoinPresolveDual.hpp 1510 2011-12-08 23:56:01Z lou $ */
2 
3 // Copyright (C) 2002, International Business Machines
4 // Corporation and others. All Rights Reserved.
5 // This code is licensed under the terms of the Eclipse Public License (EPL).
6 
7 #ifndef CoinPresolveDual_H
8 #define CoinPresolveDual_H
9 
36 
37  public:
38 
41 
43  inline const char *name () const { return ("remove_dual_action") ; }
44 
51  const CoinPresolveAction *next) ;
52 
58  void postsolve (CoinPostsolveMatrix *prob) const ;
59 
60  private:
61 
63  struct action {
64  double rlo_ ;
65  double rup_ ;
66  int ndx_ ;
67  } ;
68 
70  remove_dual_action(int nactions, const action *actions,
71  const CoinPresolveAction *next)
72  : CoinPresolveAction(next),
73  nactions_(nactions),
74  actions_(actions)
75  {}
76 
78  const int nactions_ ;
80  const action *actions_ ;
81 
82 } ;
83 #endif
84 
85 
const char * name() const
Name.
Abstract base class of all presolve routines.
remove_dual_action(int nactions, const action *actions, const CoinPresolveAction *next)
Constructor with postsolve actions.
~remove_dual_action()
Destructor.
void postsolve(CoinPostsolveMatrix *prob) const
Postsolve.
const CoinPresolveAction * next
The next presolve transformation.
Augments CoinPrePostsolveMatrix with information about the problem that is only needed during postsol...
Postsolve (bound restore) instruction.
const int nactions_
Count of bound restore entries.
Augments CoinPrePostsolveMatrix with information about the problem that is only needed during presolv...
static const CoinPresolveAction * presolve(CoinPresolveMatrix *prob, const CoinPresolveAction *next)
Attempt to fix variables by bounding reduced costs.
const action * actions_
Bound restore entries.
double rlo_
restored row lower bound
double rup_
restored row upper bound
Attempt to fix variables by bounding reduced costs.