cons_setppc.h File Reference

Detailed Description

Constraint handler for the set partitioning / packing / covering constraints \(1^T x\ \{=, \le, \ge\}\ 1\).

Author

Tobias Achterberg

Michael Winkler

Definition in file cons_setppc.h.

#include "scip/def.h"
#include "scip/type_cons.h"
#include "scip/type_lp.h"
#include "scip/type_retcode.h"
#include "scip/type_scip.h"
#include "scip/type_var.h"

Go to the source code of this file.

Functions
SCIP_EXPORT SCIP_RETCODE	SCIPincludeConshdlrSetppc (SCIP *scip)

Set Packing/Partitioning/Covering Constraints
This constraint handler handles three special classes of linear constraints, namely set partitioning, set packing, and set covering constraints. For a set of binary variables \(x_i, i=1,\dots,n\), a set partitioning constraint has the form \[ \sum_{i=1}^n x_i = 1, \] a set packing constraint has the form \[ \sum_{i=1}^n x_i \le 1, \] and a set covering constraint has the form \[ \sum_{i=1}^n x_i \ge 1. \]
enum	SCIP_SetppcType {   SCIP_SETPPCTYPE_PARTITIONING = 0,   SCIP_SETPPCTYPE_PACKING = 1,   SCIP_SETPPCTYPE_COVERING = 2 }
typedef enum SCIP_SetppcType	SCIP_SETPPCTYPE
SCIP_EXPORT SCIP_RETCODE	SCIPcreateConsSetpart (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
SCIP_EXPORT SCIP_RETCODE	SCIPcreateConsBasicSetpart (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars)
SCIP_EXPORT SCIP_RETCODE	SCIPcreateConsSetpack (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
SCIP_EXPORT SCIP_RETCODE	SCIPcreateConsBasicSetpack (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars)
SCIP_EXPORT SCIP_RETCODE	SCIPcreateConsSetcover (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Bool initial, SCIP_Bool separate, SCIP_Bool enforce, SCIP_Bool check, SCIP_Bool propagate, SCIP_Bool local, SCIP_Bool modifiable, SCIP_Bool dynamic, SCIP_Bool removable, SCIP_Bool stickingatnode)
SCIP_EXPORT SCIP_RETCODE	SCIPcreateConsBasicSetcover (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars)
SCIP_EXPORT SCIP_RETCODE	SCIPaddCoefSetppc (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var)
SCIP_EXPORT int	SCIPgetNVarsSetppc (SCIP *scip, SCIP_CONS *cons)
SCIP_EXPORT SCIP_VAR **	SCIPgetVarsSetppc (SCIP *scip, SCIP_CONS *cons)
SCIP_EXPORT SCIP_SETPPCTYPE	SCIPgetTypeSetppc (SCIP *scip, SCIP_CONS *cons)
SCIP_EXPORT SCIP_Real	SCIPgetDualsolSetppc (SCIP *scip, SCIP_CONS *cons)
SCIP_EXPORT SCIP_Real	SCIPgetDualfarkasSetppc (SCIP *scip, SCIP_CONS *cons)
SCIP_EXPORT SCIP_ROW *	SCIPgetRowSetppc (SCIP *scip, SCIP_CONS *cons)
SCIP_EXPORT int	SCIPgetNFixedonesSetppc (SCIP *scip, SCIP_CONS *cons)
SCIP_EXPORT int	SCIPgetNFixedzerosSetppc (SCIP *scip, SCIP_CONS *cons)
SCIP_EXPORT SCIP_RETCODE	SCIPcleanupConssSetppc (SCIP *scip, SCIP_Bool onlychecked, SCIP_Bool *infeasible, int *naddconss, int *ndelconss, int *nchgcoefs, int *nfixedvars)