heur_subnlp.h
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21 * This heuristic applies a NLP local search to a nonlinear CIP after fixing all discrete variables. 25 * The heuristic only runs if continuous nonlinearities are present (@ref SCIPhasNLPContinuousNonlinearity()). 31 * variables in a nonlinear CIP in a way that a (possibly mixed-integer) linear subproblem is obtained. 34 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/ 53 * Is called, for example, by a constraint handler that handles nonlinear constraints when a check on feasibility of a solution fails. 68 SCIP_RESULT* result, /**< pointer to store result of: solution found, no solution found, or fixing is infeasible (cutoff) */ 69 SCIP_SOL* refpoint, /**< point to take fixation of discrete variables from, and startpoint for NLP solver; if NULL, then LP solution is used */ 73 SCIP_Longint* iterused /**< buffer to store number of iterations used by NLP solver, or NULL if not of interest */ 76 /** for a given solution, resolves the corresponding subNLP and updates solution values for continuous variables, if NLP solution is feasible in original problem */ 81 SCIP_SOL* sol, /**< solution for which to solve NLP, and where to store resolved solution values */ 83 SCIP_Longint itercontingent, /**< iteration limit for NLP solver, or -1 for default of NLP heuristic */ 94 SCIP_Bool addcombconss, /**< whether to add combinatorial linear constraints, i.e., linear constraints that involve only discrete variables */ 95 SCIP_Bool addcontconss /**< whether to add continuous linear constraints, i.e., linear constraints that involve not only discrete variables */
SCIP_RETCODE SCIPresolveSolHeurSubNlp(SCIP *scip, SCIP_HEUR *heur, SCIP_SOL *sol, SCIP_Bool *success, SCIP_Longint itercontingent, SCIP_Real timelimit) SCIP_RETCODE SCIPincludeHeurSubNlp(SCIP *scip) SCIP_RETCODE SCIPaddLinearConsToNlpHeurSubNlp(SCIP *scip, SCIP_HEUR *heur, SCIP_Bool addcombconss, SCIP_Bool addcontconss) SCIP * SCIPgetSubScipHeurSubNlp(SCIP *scip, SCIP_HEUR *heur) SCIP_RETCODE SCIPapplyHeurSubNlp(SCIP *scip, SCIP_HEUR *heur, SCIP_RESULT *result, SCIP_SOL *refpoint, SCIP_Longint itercontingent, SCIP_Real timelimit, SCIP_Real minimprove, SCIP_Longint *iterused) SCIP_VAR ** SCIPgetVarMappingScip2SubScipHeurSubNlp(SCIP *scip, SCIP_HEUR *heur) SCIP_RETCODE SCIPupdateStartpointHeurSubNlp(SCIP *scip, SCIP_HEUR *heur, SCIP_SOL *solcand, SCIP_Real violation) Definition: objbranchrule.h:33 SCIP_SOL * SCIPgetStartCandidateHeurSubNlp(SCIP *scip, SCIP_HEUR *heur) SCIP_VAR ** SCIPgetVarMappingSubScip2ScipHeurSubNlp(SCIP *scip, SCIP_HEUR *heur) SCIP callable library. |