#include <OsiCut.hpp>

Inheritance diagram for OsiCut:

Public Member Functions
Effectiveness
void	setEffectiveness (double e)
	Set effectiveness. More...

double	effectiveness () const
	Get effectiveness. More...

GloballyValid
void	setGloballyValid (bool trueFalse)
	Set globallyValid (nonzero true) More...

void	setGloballyValid ()

void	setNotGloballyValid ()

bool	globallyValid () const
	Get globallyValid. More...

void	setGloballyValidAsInteger (int trueFalse)
	Set globallyValid as integer (nonzero true) More...

int	globallyValidAsInteger () const
	Get globallyValid. More...

Debug stuff
virtual void	print () const
	Print cuts in collection. More...

Comparison operators
virtual bool	operator== (const OsiCut &rhs) const
	equal. 2 cuts are equal if there effectiveness are equal More...

virtual bool	operator!= (const OsiCut &rhs) const
	not equal More...

virtual bool	operator< (const OsiCut &rhs) const
	less than. True if this.effectiveness < rhs.effectiveness More...

virtual bool	operator> (const OsiCut &rhs) const
	less than. True if this.effectiveness > rhs.effectiveness More...

Sanity checks on cut
virtual bool	consistent () const =0
	Returns true if the cut is consistent with respect to itself, without considering any data in the model. More...

virtual bool	consistent (const OsiSolverInterface &si) const =0
	Returns true if cut is consistent when considering the solver interface's model. More...

virtual bool	infeasible (const OsiSolverInterface &si) const =0
	Returns true if the cut is infeasible "with respect to itself" and cannot be satisfied. More...

virtual double	violated (const double *solution) const =0
	Returns infeasibility of the cut with respect to solution passed in i.e. More...

Protected Member Functions
Constructors and destructors
	OsiCut ()
	Default Constructor. More...

	OsiCut (const OsiCut &)
	Copy constructor. More...

OsiCut &	operator= (const OsiCut &rhs)
	Assignment operator. More...

virtual	~OsiCut ()
	Destructor. More...

Private Attributes
Private member data
double	effectiveness_
	Effectiveness. More...

int	globallyValid_
	If cut has global validity i.e. can be used anywhere in tree. More...

Detailed Description

Definition at line 35 of file OsiCut.hpp.

Constructor & Destructor Documentation

OsiCut::OsiCut ( )

protected

Default Constructor.

OsiCut::OsiCut ( const OsiCut & )

protected

Copy constructor.

virtual OsiCut::~OsiCut ( )

protectedvirtual

Destructor.

Member Function Documentation

void OsiCut::setEffectiveness ( double e )

inline

Set effectiveness.

Definition at line 216 of file OsiCut.hpp.

double OsiCut::effectiveness ( ) const

inline

Get effectiveness.

Definition at line 217 of file OsiCut.hpp.

void OsiCut::setGloballyValid ( bool trueFalse )

inline

Set globallyValid (nonzero true)

Definition at line 50 of file OsiCut.hpp.

void OsiCut::setGloballyValid ( )

inline

Definition at line 54 of file OsiCut.hpp.

void OsiCut::setNotGloballyValid ( )

inline

Definition at line 58 of file OsiCut.hpp.

bool OsiCut::globallyValid ( ) const

inline

Get globallyValid.

Definition at line 63 of file OsiCut.hpp.

void OsiCut::setGloballyValidAsInteger ( int trueFalse )

inline

Set globallyValid as integer (nonzero true)

Definition at line 68 of file OsiCut.hpp.

int OsiCut::globallyValidAsInteger ( ) const

inline

Get globallyValid.

Definition at line 73 of file OsiCut.hpp.

virtual void OsiCut::print ( ) const

inlinevirtual

Print cuts in collection.

Reimplemented in OsiRowCut, and OsiColCut.

Definition at line 82 of file OsiCut.hpp.

bool OsiCut::operator== ( const OsiCut & rhs ) const

inlinevirtual

equal. 2 cuts are equal if there effectiveness are equal

Definition at line 232 of file OsiCut.hpp.

bool OsiCut::operator!= ( const OsiCut & rhs ) const

inlinevirtual

not equal

Definition at line 236 of file OsiCut.hpp.

bool OsiCut::operator< ( const OsiCut & rhs ) const

inlinevirtual

less than. True if this.effectiveness < rhs.effectiveness

Definition at line 240 of file OsiCut.hpp.

bool OsiCut::operator> ( const OsiCut & rhs ) const

inlinevirtual

less than. True if this.effectiveness > rhs.effectiveness

Definition at line 244 of file OsiCut.hpp.

virtual bool OsiCut::consistent ( ) const

inlinepure virtual

Returns true if the cut is consistent with respect to itself, without considering any data in the model.

For example, it might check to ensure that a column index is not negative.

Implemented in OsiRowCut, and OsiColCut.

virtual bool OsiCut::consistent ( const OsiSolverInterface & si ) const

inlinepure virtual

Returns true if cut is consistent when considering the solver interface's model.

For example, it might check to ensure that a column index is not greater than the number of columns in the model. Assumes consistent() is true.

Implemented in OsiRowCut, and OsiColCut.

virtual bool OsiCut::infeasible ( const OsiSolverInterface & si ) const

inlinepure virtual

Returns true if the cut is infeasible "with respect to itself" and cannot be satisfied.

This method does NOT check whether adding the cut to the solver interface's model will make the -model- infeasble. A cut which returns !infeasible(si) may very well make the model infeasible. (Of course, adding a cut with returns infeasible(si) will make the model infeasible.)

The "with respect to itself" is in quotes becaues in the case where the cut simply replaces existing bounds, it may make sense to test infeasibility with respect to the current bounds held in the solver interface's model. For example, if the cut has a single variable in it, it might check that the maximum of new and existing lower bounds is greater than the minium of the new and existing upper bounds.

Assumes that consistent(si) is true.
Infeasible cuts can be a useful mechanism for a cut generator to inform the solver interface that its detected infeasibility of the problem.

Implemented in OsiRowCut, and OsiColCut.

virtual double OsiCut::violated ( const double * solution ) const

pure virtual

Returns infeasibility of the cut with respect to solution passed in i.e.

is positive if cuts off that solution. solution is getNumCols() long..

Implemented in OsiRowCut, and OsiColCut.

OsiCut& OsiCut::operator= ( const OsiCut & rhs )

protected

Assignment operator.

Member Data Documentation

double OsiCut::effectiveness_

private

Effectiveness.

Definition at line 201 of file OsiCut.hpp.

int OsiCut::globallyValid_

private

If cut has global validity i.e. can be used anywhere in tree.

Definition at line 203 of file OsiCut.hpp.

The documentation for this class was generated from the following file:

/tmp/DyLP-1.10.4/Osi/src/Osi/OsiCut.hpp

Public Member Functions

Protected Member Functions

Private Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation