SCIP
Solving Constraint Integer Programs
cons_knapsack.h File Reference
Detailed Description
Constraint handler for knapsack constraints of the form \(a^T x \le b\), x binary and \(a \ge 0\).
Definition in file cons_knapsack.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_sepa.h"#include "scip/type_sol.h"#include "scip/type_var.h"Go to the source code of this file.
Functions | |
| SCIP_EXPORT SCIP_RETCODE | SCIPincludeConshdlrKnapsack (SCIP *scip) |
Knapsack Constraints | |
This constraint handler handles a special type of linear constraints, namely knapsack constraints. A knapsack constraint has the form \[ \sum_{i=1}^n a_i x_i \leq b \] with non-negative integer coefficients \(a_i\), integer right-hand side \(b\), and binary variables \(x_i\). | |
| SCIP_EXPORT SCIP_RETCODE | SCIPcreateConsKnapsack (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Longint *weights, SCIP_Longint capacity, 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 | SCIPcreateConsBasicKnapsack (SCIP *scip, SCIP_CONS **cons, const char *name, int nvars, SCIP_VAR **vars, SCIP_Longint *weights, SCIP_Longint capacity) |
| SCIP_EXPORT SCIP_RETCODE | SCIPaddCoefKnapsack (SCIP *scip, SCIP_CONS *cons, SCIP_VAR *var, SCIP_Longint weight) |
| SCIP_EXPORT SCIP_Longint | SCIPgetCapacityKnapsack (SCIP *scip, SCIP_CONS *cons) |
| SCIP_EXPORT SCIP_RETCODE | SCIPchgCapacityKnapsack (SCIP *scip, SCIP_CONS *cons, SCIP_Longint capacity) |
| SCIP_EXPORT int | SCIPgetNVarsKnapsack (SCIP *scip, SCIP_CONS *cons) |
| SCIP_EXPORT SCIP_VAR ** | SCIPgetVarsKnapsack (SCIP *scip, SCIP_CONS *cons) |
| SCIP_EXPORT SCIP_Longint * | SCIPgetWeightsKnapsack (SCIP *scip, SCIP_CONS *cons) |
| SCIP_EXPORT SCIP_Real | SCIPgetDualsolKnapsack (SCIP *scip, SCIP_CONS *cons) |
| SCIP_EXPORT SCIP_Real | SCIPgetDualfarkasKnapsack (SCIP *scip, SCIP_CONS *cons) |
| SCIP_EXPORT SCIP_ROW * | SCIPgetRowKnapsack (SCIP *scip, SCIP_CONS *cons) |
| SCIP_EXPORT SCIP_RETCODE | SCIPsolveKnapsackExactly (SCIP *scip, int nitems, SCIP_Longint *weights, SCIP_Real *profits, SCIP_Longint capacity, int *items, int *solitems, int *nonsolitems, int *nsolitems, int *nnonsolitems, SCIP_Real *solval, SCIP_Bool *success) |
| SCIP_EXPORT SCIP_RETCODE | SCIPsolveKnapsackApproximately (SCIP *scip, int nitems, SCIP_Longint *weights, SCIP_Real *profits, SCIP_Longint capacity, int *items, int *solitems, int *nonsolitems, int *nsolitems, int *nnonsolitems, SCIP_Real *solval) |
| SCIP_EXPORT SCIP_RETCODE | SCIPseparateKnapsackCuts (SCIP *scip, SCIP_CONS *cons, SCIP_SEPA *sepa, SCIP_VAR **vars, int nvars, SCIP_Longint *weights, SCIP_Longint capacity, SCIP_SOL *sol, SCIP_Bool usegubs, SCIP_Bool *cutoff, int *ncuts) |
| SCIP_EXPORT SCIP_RETCODE | SCIPseparateRelaxedKnapsack (SCIP *scip, SCIP_CONS *cons, SCIP_SEPA *sepa, int nknapvars, SCIP_VAR **knapvars, SCIP_Real *knapvals, SCIP_Real valscale, SCIP_Real rhs, SCIP_SOL *sol, SCIP_Bool *cutoff, int *ncuts) |
| SCIP_EXPORT SCIP_RETCODE | SCIPcleanupConssKnapsack (SCIP *scip, SCIP_Bool onlychecked, SCIP_Bool *infeasible) |