# SCIP

Solving Constraint Integer Programs

heur_dualval.h File Reference

## Detailed Description

primal heuristic that uses dualvalues for successive switching variable values

This heuristic tries to find solutions by taking the LP or NLP, rounding solution values, fixing the variables to the rounded values and then changing some of the values.To determine which variable is changed we give each variable a ranking dependent on its dualvalue. We work with a transformed problem that is always feasible and has objective = 0 iff the original problem is also feasible. Thus we cannot expect to find really good solutions.

Definition in file heur_dualval.h.

#include "scip/def.h"
#include "scip/type_heur.h"
#include "scip/type_result.h"
#include "scip/type_retcode.h"
#include "scip/type_scip.h"
#include "scip/type_sol.h"

Go to the source code of this file.

## Functions

SCIP_EXPORT SCIP_RETCODE SCIPincludeHeurDualval (SCIP *scip)

SCIP_EXPORT SCIP_RETCODE SCIPapplyHeurDualval (SCIP *scip, SCIP_HEUR *heur, SCIP_RESULT *result, SCIP_SOL *refpoint)