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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* */
/* This file is part of the program and library */
/* SCIP --- Solving Constraint Integer Programs */
/* */
/* Copyright 2002-2022 Zuse Institute Berlin */
/* */
/* Licensed under the Apache License, Version 2.0 (the "License"); */
/* you may not use this file except in compliance with the License. */
/* You may obtain a copy of the License at */
/* */
/* http://www.apache.org/licenses/LICENSE-2.0 */
/* */
/* Unless required by applicable law or agreed to in writing, software */
/* distributed under the License is distributed on an "AS IS" BASIS, */
/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
/* See the License for the specific language governing permissions and */
/* limitations under the License. */
/* */
/* You should have received a copy of the Apache-2.0 license */
/* along with SCIP; see the file LICENSE. If not visit scipopt.org. */
/* */
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**@file prop_pseudoobj.h
* @ingroup PROPAGATORS
* @brief Pseudo objective propagator
* @author Tobias Achterberg
* @author Stefan Heinz
*
* This propagator propagates the objective function using the cutoff bound and the pseudo objective value. The pseudo
* objective value can be seen as minimum activity of the linear objective function. Using this, this propagator checks
* if variables with non-zero objective coefficients can exceed the cutoff bound. If this is the case the corresponding
* bound can be tightened.
*/
/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
#ifndef __SCIP_PROP_PSEUDOOBJ_H__
#define __SCIP_PROP_PSEUDOOBJ_H__
#include "scip/def.h"
#include "scip/type_prop.h"
#include "scip/type_retcode.h"
#include "scip/type_scip.h"
#include "scip/type_var.h"
#ifdef __cplusplus
extern "C" {
#endif
/** creates the pseudo objective function propagator and includes it in SCIP
*
* @ingroup PropagatorIncludes
*/
SCIP_EXPORT
SCIP_RETCODE SCIPincludePropPseudoobj(
SCIP* scip /**< SCIP data structure */
);
/**@addtogroup PROPAGATORS
*
* @{
*/
/** propagates the cutoff bound for the given variables */
SCIP_EXPORT
SCIP_RETCODE SCIPpropagateCutoffboundVar(
SCIP* scip, /**< SCIP data structure */
SCIP_PROP* prop, /**< propagator, or NULL */
SCIP_VAR* var, /**< variables to propagate */
SCIP_Real cutoffbound, /**< cutoff bound to use */
SCIP_Real pseudoobjval, /**< pseudo objective value to use */
SCIP_Bool* tightened /**< pointer to if the domain was tightened */
);
/** @} */
#ifdef __cplusplus
}
#endif
#endif