Detailed Description

interface for symmetry computations to sassy as a preprocessor to bliss

Author: Marc Pfetsch

Definition in file compute_symmetry_sassy_bliss.cpp.

#include "compute_symmetry.h"
#include <bliss/defs.hh>
#include <bliss/graph.hh>
#include <sassy/preprocessor.h>
#include <sassy/tools/bliss_converter.h>
#include "build_sassy_graph.h"
#include "scip/expr_var.h"
#include "scip/expr_sum.h"
#include "scip/expr_pow.h"
#include "scip/expr.h"
#include "scip/cons_nonlinear.h"
#include "scip/cons_linear.h"
#include "scip/scip_mem.h"
#include "scip/symmetry_graph.h"

Go to the source code of this file.

Data Structures
struct	SYMMETRY_Data

Macros
#define	STR(x)

#define	XSTR(x)

Functions
static void	sassyhook (void user_param, int n, const int aut, int nsupp, const int *suppa)

SCIP_Bool	SYMcanComputeSymmetry (void)

const char *	SYMsymmetryGetName (void)

const char *	SYMsymmetryGetDesc (void)

const char *	SYMsymmetryGetAddName (void)

const char *	SYMsymmetryGetAddDesc (void)

static SCIP_RETCODE	computeAutomorphisms (SCIP scip, SYM_SYMTYPE symtype, sassy::static_graph G, int nsymvars, int maxgenerators, int **perms, int nperms, int nmaxperms, SCIP_Real log10groupsize, SCIP_Bool restricttovars, SCIP_Real *symcodetime)

SCIP_RETCODE	SYMcomputeSymmetryGenerators (SCIP scip, int maxgenerators, SYM_GRAPH graph, int nperms, int nmaxperms, int **perms, SCIP_Real log10groupsize, SCIP_Real *symcodetime)

SCIP_Bool	SYMcheckGraphsAreIdentical (SCIP scip, SYM_SYMTYPE symtype, SYM_GRAPH G1, SYM_GRAPH *G2)

Macro Definition Documentation

◆ STR

#define STR ( x )

Value:

#x

Definition at line 204 of file compute_symmetry_sassy_bliss.cpp.

◆ XSTR

#define XSTR ( x )

Value:

STR(x)

x

SCIP_VAR ** x

Definition circlepacking.c:63

STR

#define STR(x)

Definition lpi_msk.c:754

Definition at line 205 of file compute_symmetry_sassy_bliss.cpp.

Referenced by SYMsymmetryGetAddName().

Function Documentation

◆ sassyhook()

static void sassyhook	(	void *	user_param,
		int	n,
		const int *	aut,
		int	nsupp,
		const int *	suppa )

static

callback function for sassy

Parameters

user_param	parameter supplied at call to sassy
n	dimension of permutations
aut	permutation
nsupp	support size
suppa	support list

Definition at line 99 of file compute_symmetry_sassy_bliss.cpp.

References assert(), SYMMETRY_Data::maxgenerators, SYMMETRY_Data::nmaxperms, SYMMETRY_Data::nperms, SYMMETRY_Data::npermvars, NULL, SYMMETRY_Data::perms, SYMMETRY_Data::restricttovars, SYMMETRY_Data::scip, SCIP_OKAY, SCIPallocBlockMemoryArray, SCIPcalcMemGrowSize(), SCIPreallocBlockMemoryArray, SYM_SYMTYPE_PERM, SYM_SYMTYPE_SIGNPERM, and SYMMETRY_Data::symtype.

Referenced by computeAutomorphisms().

◆ SYMcanComputeSymmetry()

SCIP_Bool SYMcanComputeSymmetry ( void )

return whether symmetry can be computed

Definition at line 183 of file compute_symmetry_sassy_bliss.cpp.

References SCIP_Bool, and TRUE.

◆ SYMsymmetryGetName()

const char * SYMsymmetryGetName ( void )

return name of external program used to compute generators

Definition at line 189 of file compute_symmetry_sassy_bliss.cpp.

◆ SYMsymmetryGetDesc()

const char * SYMsymmetryGetDesc ( void )

return description of external program used to compute generators

Definition at line 199 of file compute_symmetry_sassy_bliss.cpp.

◆ SYMsymmetryGetAddName()

const char * SYMsymmetryGetAddName ( void )

return name of additional external program used for computing symmetries

Definition at line 208 of file compute_symmetry_sassy_bliss.cpp.

References XSTR.

◆ SYMsymmetryGetAddDesc()

const char * SYMsymmetryGetAddDesc ( void )

return description of additional external program used to compute symmetries

Definition at line 214 of file compute_symmetry_sassy_bliss.cpp.

◆ computeAutomorphisms()

static SCIP_RETCODE computeAutomorphisms	(	SCIP *	scip,
		SYM_SYMTYPE	symtype,
		sassy::static_graph *	G,
		int	nsymvars,
		int	maxgenerators,
		int ***	perms,
		int *	nperms,
		int *	nmaxperms,
		SCIP_Real *	log10groupsize,
		SCIP_Bool	restricttovars,
		SCIP_Real *	symcodetime )

static

computes autormorphisms of a graph

Parameters

scip	SCIP pointer
symtype	type of symmetries that need to be computed
G	pointer to graph for that automorphisms are computed
nsymvars	number of variables encoded in graph
maxgenerators	maximum number of generators to be constructed (=0 if unlimited)
perms	pointer to store generators as (nperms x npermvars) matrix
nperms	pointer to store number of permutations
nmaxperms	pointer to store maximal number of permutations (needed for freeing storage)
log10groupsize	pointer to store log10 of size of group
restricttovars	whether permutations shall be restricted to variables
symcodetime	pointer to store the time for symmetry code

Definition at line 221 of file compute_symmetry_sassy_bliss.cpp.

References assert(), SYMMETRY_Data::maxgenerators, SYMMETRY_Data::nmaxperms, SYMMETRY_Data::nperms, SYMMETRY_Data::npermvars, NULL, SYMMETRY_Data::perms, SYMMETRY_Data::restricttovars, sassyhook(), SYMMETRY_Data::scip, SCIP_Bool, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIPgetProbName(), SCIPgetSolvingTime(), SCIPsnprintf(), and SYMMETRY_Data::symtype.

Referenced by SYMcheckGraphsAreIdentical(), and SYMcomputeSymmetryGenerators().

◆ SYMcomputeSymmetryGenerators()

SCIP_RETCODE SYMcomputeSymmetryGenerators	(	SCIP *	scip,
		int	maxgenerators,
		SYM_GRAPH *	graph,
		int *	nperms,
		int *	nmaxperms,
		int ***	perms,
		SCIP_Real *	log10groupsize,
		SCIP_Real *	symcodetime )

compute generators of symmetry group

Parameters

scip	SCIP pointer
maxgenerators	maximal number of generators constructed (= 0 if unlimited)
graph	symmetry detection graph
nperms	pointer to store number of permutations
nmaxperms	pointer to store maximal number of permutations (needed for freeing storage)
perms	pointer to store permutation generators as (nperms x npermvars) matrix
log10groupsize	pointer to store log10 of size of group
symcodetime	pointer to store the time for symmetry code