Scippy

    SCIP

    Solving Constraint Integer Programs

    Macros | Functions
    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.

    ◆ RELAX_DESC

    #define RELAX_DESC   "relaxator solving a convex NLP relaxation"

    Definition at line 39 of file relax_nlp.c.

    ◆ RELAX_PRIORITY

    #define RELAX_PRIORITY   10

    Definition at line 40 of file relax_nlp.c.

    ◆ RELAX_FREQ

    #define RELAX_FREQ   1

    Definition at line 41 of file relax_nlp.c.

    ◆ NLPITERLIMIT

    #define NLPITERLIMIT   500

    iteration limit of NLP solver

    Definition at line 43 of file relax_nlp.c.

    ◆ FEASTOLFAC

    #define FEASTOLFAC   0.01

    factor for NLP feasibility tolerance

    Definition at line 44 of file relax_nlp.c.

    ◆ RELOBJTOLFAC

    #define RELOBJTOLFAC   0.01

    factor for NLP relative objective tolerance

    Definition at line 45 of file relax_nlp.c.

    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
    scipSCIP 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().