Scippy

SCIP

Solving Constraint Integer Programs

Detailed Description

propagator for symmetry handling

Author: Marc Pfetsch; Thomas Rehn; Christopher Hojny

Definition in file prop_symmetry.h.

#include <scip/scip.h>
#include <symmetry/type_symmetry.h>

Go to the source code of this file.

Functions
SCIP_RETCODE	SCIPincludePropSymmetry (SCIP *scip)

SCIP_RETCODE	SCIPgetSymmetry (SCIP scip, int npermvars, SCIP_VAR *permvars, SCIP_HASHMAP permvarmap, int nperms, int perms, int permstrans, SCIP_Real log10groupsize, SCIP_Bool binvaraffected, int components, int componentbegins, int vartocomponent, int ncomponents)

SCIP_Bool	SCIPisOrbitalfixingEnabled (SCIP *scip)

int	SCIPgetSymmetryNGenerators (SCIP *scip)

Function Documentation

◆ SCIPincludePropSymmetry()

SCIP_RETCODE SCIPincludePropSymmetry ( SCIP * scip )

include symmetry propagator

Parameters

scip	SCIP data structure

Definition at line 7359 of file prop_symmetry.c.

References DEFAULT_ADDCONFLICTCUTS, DEFAULT_ADDCONSSTIMING, DEFAULT_ADDSTRONGSBCS, DEFAULT_ADDSYMRESACKS, DEFAULT_ADDWEAKSBCS, DEFAULT_CHECKSYMMETRIES, DEFAULT_COMPRESSSYMMETRIES, DEFAULT_COMPRESSTHRESHOLD, DEFAULT_CONSSADDLP, DEFAULT_DETECTORBITOPES, DEFAULT_DETECTSUBGROUPS, DEFAULT_DISPLAYNORBITVARS, DEFAULT_DOUBLEEQUATIONS, DEFAULT_MAXGENERATORS, DEFAULT_MAXNCONSSSUBGROUP, DEFAULT_OFSYMCOMPTIMING, DEFAULT_ONLYBINARYSYMMETRY, DEFAULT_PERFORMPRESOLVING, DEFAULT_PREFERLESSROWS, DEFAULT_RECOMPUTERESTART, DEFAULT_SSTADDCUTS, DEFAULT_SSTLEADERRULE, DEFAULT_SSTLEADERVARTYPE, DEFAULT_SSTMIXEDCOMPONENTS, DEFAULT_SSTTIEBREAKRULE, DEFAULT_SYMFIXNONBINARYVARS, DEFAULT_USECOLUMNSPARSITY, DEFAULT_USEDYNAMICPROP, EVENTHDLR_SYMMETRY_DESC, EVENTHDLR_SYMMETRY_NAME, FALSE, NULL, PROP_DELAY, PROP_DESC, PROP_FREQ, PROP_NAME, PROP_PRESOL_MAXROUNDS, PROP_PRESOL_PRIORITY, PROP_PRESOLTIMING, PROP_PRIORITY, PROP_TIMING, SCIP_CALL, SCIP_OKAY, SCIPaddBoolParam(), SCIPaddIntParam(), SCIPaddRealParam(), SCIPallocBlockMemory, SCIPgetSymmetry(), SCIPincludeEventhdlrBasic(), SCIPincludeExternalCodeInformation(), SCIPincludePropBasic(), SCIPincludeTable(), SCIPsetPropExit(), SCIPsetPropExitpre(), SCIPsetPropFree(), SCIPsetPropInitpre(), SCIPsetPropPresol(), SCIPsetPropResprop(), SYMcanComputeSymmetry(), SYMsymmetryGetDesc(), SYMsymmetryGetName(), TABLE_DESC_ORBITALFIXING, TABLE_EARLIEST_ORBITALFIXING, TABLE_NAME_ORBITALFIXING, TABLE_POSITION_ORBITALFIXING, and TRUE.

Referenced by SCIP_DECL_PROPFREE(), and SCIPincludeDefaultPlugins().

◆ SCIPgetSymmetry()

SCIP_RETCODE SCIPgetSymmetry	(	SCIP *	scip,
		int *	npermvars,
		SCIP_VAR ***	permvars,
		SCIP_HASHMAP **	permvarmap,
		int *	nperms,
		int ***	perms,
		int ***	permstrans,
		SCIP_Real *	log10groupsize,
		SCIP_Bool *	binvaraffected,
		int **	components,
		int **	componentbegins,
		int **	vartocomponent,
		int *	ncomponents
	)

return currently available symmetry group information

Parameters

scip	SCIP data structure
npermvars	pointer to store number of variables for permutations
permvars	pointer to store variables on which permutations act
permvarmap	pointer to store hash map of permvars (or NULL)
nperms	pointer to store number of permutations
perms	pointer to store permutation generators as (nperms x npermvars) matrix (or NULL)
permstrans	pointer to store permutation generators as (npermvars x nperms) matrix (or NULL)
log10groupsize	pointer to store log10 of group size (or NULL)
binvaraffected	pointer to store whether binary variables are affected (or NULL)
components	pointer to store components of symmetry group (or NULL)
componentbegins	pointer to store begin positions of components in components array (or NULL)
vartocomponent	pointer to store assignment from variable to its component (or NULL)
ncomponents	pointer to store number of components (or NULL)

Definition at line 7616 of file prop_symmetry.c.

References SYM_Sortgraphcompvars::components, NULL, PROP_NAME, SCIP_Bool, SCIP_OKAY, SCIP_PLUGINNOTFOUND, SCIPerrorMessage, SCIPfindProp(), SCIPisOrbitalfixingEnabled(), SCIPpropGetData(), and SCIPpropGetName().

Referenced by initOrbits(), and SCIPincludePropSymmetry().

◆ SCIPisOrbitalfixingEnabled()

SCIP_Bool SCIPisOrbitalfixingEnabled ( SCIP * scip )

return whether orbital fixing is enabled

Parameters

scip	SCIP data structure

Definition at line 7696 of file prop_symmetry.c.

References FALSE, NULL, PROP_NAME, SCIPfindProp(), SCIPgetSymmetryNGenerators(), and SCIPpropGetData().

Referenced by SCIPgetSymmetry().

◆ SCIPgetSymmetryNGenerators()

int SCIPgetSymmetryNGenerators ( SCIP * scip )

return number of the symmetry group's generators

Parameters

scip	SCIP data structure

Definition at line 7716 of file prop_symmetry.c.

References NULL, PROP_NAME, SCIPfindProp(), and SCIPpropGetData().

Referenced by SCIPisOrbitalfixingEnabled().