relax_nlp.c File Reference

Detailed Description

nlp relaxator

Author

Benjamin Mueller

Definition in file relax_nlp.c.

#include <assert.h>
#include "relax_nlp.h"
#include "scip/scip_nlpi.h"

Go to the source code of this file.

Macros
#define	RELAX_NAME   "nlp"
#define	RELAX_DESC   "relaxator solving a convex NLP relaxation"
#define	RELAX_PRIORITY   10
#define	RELAX_FREQ   1
#define	NLPITERLIMIT   500
#define	FEASTOLFAC   0.01
#define	RELOBJTOLFAC   0.01

Functions
static	SCIP_DECL_RELAXINITSOL (relaxInitsolNlp)
static	SCIP_DECL_RELAXEXITSOL (relaxExitsolNlp)
static	SCIP_DECL_RELAXEXEC (relaxExecNlp)
SCIP_RETCODE	SCIPincludeRelaxNlp (SCIP *scip)

Macro Definition Documentation

RELAX_NAME

#define RELAX_NAME   "nlp"

Definition at line 38 of file relax_nlp.c.

Referenced by SCIPincludeRelaxNlp().

RELAX_DESC

#define RELAX_DESC   "relaxator solving a convex NLP relaxation"

Definition at line 39 of file relax_nlp.c.

Referenced by SCIPincludeRelaxNlp().

RELAX_PRIORITY

#define RELAX_PRIORITY   10

Definition at line 40 of file relax_nlp.c.

Referenced by SCIPincludeRelaxNlp().

RELAX_FREQ

#define RELAX_FREQ   1

Definition at line 41 of file relax_nlp.c.

Referenced by SCIPincludeRelaxNlp().

NLPITERLIMIT

#define NLPITERLIMIT   500

iteration limit of NLP solver

Definition at line 43 of file relax_nlp.c.

Referenced by SCIP_DECL_RELAXEXEC().

FEASTOLFAC

#define FEASTOLFAC   0.01

factor for NLP feasibility tolerance

Definition at line 44 of file relax_nlp.c.

Referenced by SCIP_DECL_RELAXEXEC().

RELOBJTOLFAC

#define RELOBJTOLFAC   0.01

factor for NLP relative objective tolerance

Definition at line 45 of file relax_nlp.c.

Referenced by SCIP_DECL_RELAXEXEC().

Function Documentation

SCIP_DECL_RELAXINITSOL()

static SCIP_DECL_RELAXINITSOL ( relaxInitsolNlp  )

static

solving process initialization method of relaxator (called when branch and bound process is about to begin)

Definition at line 64 of file relax_nlp.c.

References SCIP_OKAY.

SCIP_DECL_RELAXEXITSOL()

static SCIP_DECL_RELAXEXITSOL ( relaxExitsolNlp  )

static

solving process deinitialization method of relaxator (called before branch and bound process data is freed)

Definition at line 72 of file relax_nlp.c.

References SCIP_OKAY.

SCIP_DECL_RELAXEXEC()

static SCIP_DECL_RELAXEXEC ( relaxExecNlp  )

static

execution method of relaxator

Definition at line 80 of file relax_nlp.c.

References SCIP_NlpParam::feastol, FEASTOLFAC, SCIP_NlpParam::iterlimit, NLPITERLIMIT, NULL, SCIP_NlpParam::opttol, RELOBJTOLFAC, SCIP_CALL, SCIP_DIDNOTRUN, SCIP_NLPPARAM_DEFAULT, SCIP_NLPSOLSTAT_LOCOPT, SCIP_OKAY, SCIP_Real, SCIP_SUCCESS, SCIPaddNlpiProblemRows(), SCIPallColsInLP(), SCIPblkmem(), SCIPclearRelaxSolVals(), SCIPcreateNlpiProblemFromNlRows(), SCIPdebugMsg, SCIPfeastol(), SCIPgetCutoffbound(), SCIPgetLPRows(), SCIPgetNlpis(), SCIPgetNLPNlRows(), SCIPgetNLPRows(), SCIPgetNNlpis(), SCIPgetNNLPNlRows(), SCIPgetNVars(), SCIPgetRelaxSolObj(), SCIPgetVars(), SCIPhashmapCreate(), SCIPhashmapFree(), SCIPinDive(), SCIPinfinity(), SCIPinProbing(), SCIPisFeasLE(), SCIPisGT(), SCIPisInfinity(), SCIPisNLPConstructed(), SCIPisRelaxSolValid(), SCIPmarkRelaxSolValid(), SCIPsetRelaxSolVal(), SCIPvarGetLbLocal(), SCIPvarGetName(), SCIPvarGetUbLocal(), and TRUE.

SCIPincludeRelaxNlp()

SCIP_RETCODE SCIPincludeRelaxNlp

(

SCIP *

scip

)

creates the nlp relaxator and includes it in SCIP

Parameters

scip	SCIP data structure

Definition at line 174 of file relax_nlp.c.

References NULL, RELAX_DESC, RELAX_FREQ, RELAX_NAME, RELAX_PRIORITY, SCIP_CALL, SCIP_OKAY, SCIPincludeRelaxBasic(), SCIPsetRelaxExitsol(), and SCIPsetRelaxInitsol().

Referenced by runShell().