branchMaxCut Class Reference
[Maximum edge cuts]

Branch & bound implementation for maximum edge cuts. More...

#include <branchMaxCut.h>

Inheritance diagram for branchMaxCut:

Public Member Functions
	branchMaxCut (abstractMixedGraph &, TNode=NoNode, TNode=NoNode) throw ()
	branchMaxCut (branchMaxCut &) throw ()
	~branchMaxCut () throw ()
unsigned long	Size () const throw ()
unsigned long	Allocated () const throw ()
TFloat	SumWeight (TNode) throw ()
TFloat	MinWeight (TNode) throw ()
TFloat	MaxWeight (TNode) throw ()
TNode	SelectVariable () throw ()
TBranchDir	DirectionConstructive (TNode i) throw (ERRange)
TBranchDir	DirectionExhaustive (TNode i) throw (ERRange)
branchNode< TNode, TFloat > *	Clone () throw ()
void	Raise (TNode i) throw (ERRange)
void	Lower (TNode i) throw (ERRange)
TFloat	SolveRelaxation () throw ()
TObjectSense	ObjectSense () const throw ()
TFloat	Infeasibility () const throw ()
void	SaveSolution () throw ()
void	ReallySaveSolution () throw ()
TFloat	LocalSearch () throw ()
Data Fields
TFloat	totalWeight
TFloat	selectedWeight
TFloat	dismissedWeight
abstractMixedGraph &	G
TNode	currentVar

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Detailed Description

Branch & bound implementation for maximum edge cuts.

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Constructor & Destructor Documentation

branchMaxCut (  abstractMixedGraph &  , TNode  = NoNode, TNode  = NoNode )  throw ()

branchMaxCut (  branchMaxCut &   )  throw ()

~branchMaxCut (   )  throw ()

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Member Function Documentation

unsigned long Allocated (   )  const throw ()

Reimplemented from branchNode< TNode, TFloat >.

branchNode< TNode, TFloat > * Clone (   )  throw () [virtual]

Generate a copy of this branch node. Returns: A pointer to the copy Implements branchNode< TNode, TFloat >.

branchNode< TNode, TFloat >::TBranchDir DirectionConstructive (  TNode  v  )  throw (ERRange) [virtual]

Preferred search direction before feasibility has been achieved. Implements branchNode< TNode, TFloat >.

branchNode< TNode, TFloat >::TBranchDir DirectionExhaustive (  TNode  v  )  throw (ERRange) [virtual]

Preferred search direction after feasibility has been achieved. Implements branchNode< TNode, TFloat >.

TFloat Infeasibility (   )  const throw () [virtual]

Symbolic value for infeasible subproblems. Implements branchNode< TNode, TFloat >.

TFloat LocalSearch (   )  throw () [virtual]

Apply a probelm dependent local search method. Returns: The (possibly improved) objective value Reimplemented from branchNode< TNode, TFloat >.

void Lower (  TNode  i  )  throw (ERRange) [virtual]

Lower an upper variable bound. This operation applies after solving a relaxation and duplicating the branch node. It sets an upper variable bound to the greatest integral lower bound on the current variable value. The operation may restrict further variables, namely, if it is obvoious that no solutions for the master problem are lost. Parameters: i  The index of the restricted variable Implements branchNode< TNode, TFloat >.

TFloat MaxWeight (  TNode   )  throw ()

TFloat MinWeight (  TNode   )  throw ()

branchNode< TNode, TFloat >::TObjectSense ObjectSense (   )  const throw () [virtual]

Decide between maximization and minimization problems. Implements branchNode< TNode, TFloat >.

void Raise (  TNode  i  )  throw (ERRange) [virtual]

Raise a lower variable bound. This operation applies after solving a relaxation and duplicating the branch node. It sets a lower variable bound to the least integral upper bound on the current variable value. The operation may restrict further variables, namely, if it is obvoious that no solutions for the master problem are lost. Parameters: i  The index of the variable to be restricted Implements branchNode< TNode, TFloat >.

void ReallySaveSolution (   )  throw ()

void SaveSolution (   )  throw () [virtual]

Copy the current solution to the original problem instance. Implements branchNode< TNode, TFloat >.

TNode SelectVariable (   )  throw () [virtual]

Selection of a variable to be restricted next. Returns: The branch variable index Implements branchNode< TNode, TFloat >.

unsigned long Size (   )  const throw () [virtual]

Implements goblinRootObject.

TFloat SolveRelaxation (   )  throw () [virtual]

Solve the relaxed subproblem according. Returns: The objective value of this relaxed subproblem Implements branchNode< TNode, TFloat >.

TFloat SumWeight (  TNode   )  throw ()

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Field Documentation

TNode currentVar

TFloat dismissedWeight

abstractMixedGraph& G

TFloat selectedWeight

TFloat totalWeight