Scippy

SCIP

Solving Constraint Integer Programs

Functions
presol_sparsify.h File Reference

Detailed Description

cancel non-zeros of the constraint matrix

Author
Dieter Weninger
Leona Gottwald
Ambros Gleixner

This presolver attempts to cancel non-zero entries of the constraint matrix by adding scaled equalities to other constraints.

Definition in file presol_sparsify.h.

#include "scip/def.h"
#include "scip/type_retcode.h"
#include "scip/type_scip.h"

Go to the source code of this file.

Functions

SCIP_RETCODE SCIPincludePresolSparsify (SCIP *scip)
 

Function Documentation

◆ SCIPincludePresolSparsify()

SCIP_RETCODE SCIPincludePresolSparsify ( SCIP *  scip)

creates the sparsify presolver and includes it in SCIP

Parameters
scipSCIP data structure

Definition at line 1053 of file presol_sparsify.c.

References DEFAULT_CANCELLINEAR, DEFAULT_ENABLECOPY, DEFAULT_MAX_BIN_FILLIN, DEFAULT_MAX_CONT_FILLIN, DEFAULT_MAX_INT_FILLIN, DEFAULT_MAXCONSIDEREDNONZEROS, DEFAULT_MAXNONZEROS, DEFAULT_MAXRETRIEVEFAC, DEFAULT_PRESERVEINTCOEFS, DEFAULT_ROWSORT, DEFAULT_WAITINGFAC, FALSE, NULL, PRESOL_DESC, PRESOL_MAXROUNDS, PRESOL_NAME, PRESOL_PRIORITY, PRESOL_TIMING, SCIP_CALL, SCIP_OKAY, SCIP_REAL_MAX, SCIPaddBoolParam(), SCIPaddCharParam(), SCIPaddIntParam(), SCIPaddRealParam(), SCIPallocBlockMemory, SCIPincludePresolBasic(), SCIPsetPresolCopy(), SCIPsetPresolFree(), SCIPsetPresolInit(), and TRUE.

Referenced by SCIP_DECL_PRESOLCOPY(), and SCIPincludeDefaultPlugins().