/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /* */ /* This file is part of the program and library */ /* SCIP --- Solving Constraint Integer Programs */ /* */ /* Copyright (C) 2002-2020 Konrad-Zuse-Zentrum */ /* fuer Informationstechnik Berlin */ /* */ /* SCIP is distributed under the terms of the ZIB Academic License. */ /* */ /* You should have received a copy of the ZIB Academic License */ /* along with SCIP; see the file COPYING. If not visit scipopt.org. */ /* */ /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /**@file cons_superindicator.h * @ingroup CONSHDLRS * @brief constraint handler for indicator constraints over arbitrary constraint types * @author Ambros Gleixner * @author Frederic Pythoud * */ /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/ #ifndef __SCIP_CONS_SUPERINDICATOR_H__ #define __SCIP_CONS_SUPERINDICATOR_H__ #include "scip/def.h" #include "scip/type_cons.h" #include "scip/type_dialog.h" #include "scip/type_retcode.h" #include "scip/type_scip.h" #include "scip/type_var.h" #ifdef __cplusplus extern "C" { #endif /* * constraint-specific interface methods */ /** creates the handler for superindicator constraints and includes it in SCIP * * @ingroup ConshdlrIncludes * */ SCIP_EXPORT SCIP_RETCODE SCIPincludeConshdlrSuperindicator( SCIP* scip /**< SCIP data structure */ ); /**@addtogroup CONSHDLRS * * @{ * * @name Superindicator Constraints * * @{ * * Superindicator constraints are constraints of the form * \f[ * x_i = 1 \Rightarrow C(x) * \f] * where \f$ x_i \f$ is a binary variable and \f$ C(\dot) \f$ a constraint. The superindicator constraint is satisfied * if and only if x_i is zero or C is satisfied. */ /** creates and captures a superindicator constraint * * @note the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons() */ SCIP_EXPORT SCIP_RETCODE SCIPcreateConsSuperindicator( SCIP* scip, /**< SCIP data structure */ SCIP_CONS** cons, /**< pointer to hold the created constraint */ const char* name, /**< name of constraint */ SCIP_VAR* binvar, /**< pointer to the indicator constraint */ SCIP_CONS* slackcons, /**< constraint corresponding to the handled constraint */ SCIP_Bool initial, /**< should the LP relaxation of constraint be in the initial LP? * Usually set to TRUE. Set to FALSE for 'lazy constraints'. */ SCIP_Bool separate, /**< should the constraint be separated during LP processing? * Usually set to TRUE. */ SCIP_Bool enforce, /**< should the constraint be enforced during node processing? * TRUE for model constraints, FALSE for additional, redundant constraints. */ SCIP_Bool check, /**< should the constraint be checked for feasibility? * TRUE for model constraints, FALSE for additional, redundant constraints. */ SCIP_Bool propagate, /**< should the constraint be propagated during node processing? * Usually set to TRUE. */ SCIP_Bool local, /**< is constraint only valid locally? * Usually set to FALSE. Has to be set to TRUE, e.g., for branching constraints. */ SCIP_Bool dynamic, /**< is constraint subject to aging? * Usually set to FALSE. Set to TRUE for own cuts which * are separated as constraints. */ SCIP_Bool removable, /**< should the relaxation be removed from the LP due to aging or cleanup? * Usually set to FALSE. Set to TRUE for 'lazy constraints' and 'user cuts'. */ SCIP_Bool stickingatnode /**< should the constraint always be kept at the node where it was added, even * if it may be moved to a more global node? * Usually set to FALSE. Set to TRUE to for constraints that represent node data. */ ); /** creates and captures a superindicator constraint * in its most basic version, i. e., all constraint flags are set to their basic value as explained for the * method SCIPcreateConsSuperindicator(); all flags can be set via SCIPsetConsFLAGNAME-methods in scip.h * * @see SCIPcreateConsSuperindicator() for information about the basic constraint flag configuration * * @note the constraint gets captured, hence at one point you have to release it using the method SCIPreleaseCons() */ SCIP_EXPORT SCIP_RETCODE SCIPcreateConsBasicSuperindicator( SCIP* scip, /**< SCIP data structure */ SCIP_CONS** cons, /**< pointer to hold the created constraint */ const char* name, /**< name of constraint */ SCIP_VAR* binvar, /**< pointer to the indicator constraint */ SCIP_CONS* slackcons /**< constraint corresponding to the handled constraint */ ); /** gets binary variable corresponding to the superindicator constraint */ SCIP_EXPORT SCIP_VAR* SCIPgetBinaryVarSuperindicator( SCIP_CONS* cons /**< superindicator constraint */ ); /** gets the slack constraint corresponding to the superindicator constraint */ SCIP_EXPORT SCIP_CONS* SCIPgetSlackConsSuperindicator( SCIP_CONS* cons /**< superindicator constraint */ ); /* * constraint-dependent SCIP methods */ /** transforms the current problem into a MinUC problem (minimizing the number of unsatisfied constraints), * a CIP generalization of the MinULR (min. unsatisfied linear relations) problem */ SCIP_EXPORT SCIP_RETCODE SCIPtransformMinUC( SCIP* scip, /**< SCIP data structure */ SCIP_Bool* success /**< pointer to store whether all constraints could be transformed */ ); /* * constraint-dependent dialog entries */ /** dialog execution method for the SCIPtransformMinUC() command */ SCIP_EXPORT SCIP_DECL_DIALOGEXEC(SCIPdialogExecChangeMinUC); /** @} */ /** @} */ #ifdef __cplusplus } #endif #endif