Scippy

    SCIP

    Solving Constraint Integer Programs

    prop_rootredcost.h
    Go to the documentation of this file.
    1/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    2/* */
    3/* This file is part of the program and library */
    4/* SCIP --- Solving Constraint Integer Programs */
    5/* */
    6/* Copyright (c) 2002-2025 Zuse Institute Berlin (ZIB) */
    7/* */
    8/* Licensed under the Apache License, Version 2.0 (the "License"); */
    9/* you may not use this file except in compliance with the License. */
    10/* You may obtain a copy of the License at */
    11/* */
    12/* http://www.apache.org/licenses/LICENSE-2.0 */
    13/* */
    14/* Unless required by applicable law or agreed to in writing, software */
    15/* distributed under the License is distributed on an "AS IS" BASIS, */
    16/* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
    17/* See the License for the specific language governing permissions and */
    18/* limitations under the License. */
    19/* */
    20/* You should have received a copy of the Apache-2.0 license */
    21/* along with SCIP; see the file LICENSE. If not visit scipopt.org. */
    22/* */
    23/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    24
    25/**@file prop_rootredcost.h
    26 * @ingroup PROPAGATORS
    27 * @brief reduced cost strengthening using root node reduced costs and the cutoff bound
    28 * @author Tobias Achterberg
    29 * @author Stefan Heinz
    30 *
    31 * This propagator uses the root reduced cost to (globally) propagate against the cutoff bound. The propagator checks if
    32 * the variables with non-zero root reduced cost can exceed the cutoff bound. If this is the case the corresponding
    33 * bound can be tightened.
    34 *
    35 * The propagate is performed during the search any time a new cutoff bound (primal solution) is found.
    36 */
    37
    38/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
    39
    40#ifndef __SCIP_PROP_ROOTREDCOST_H__
    41#define __SCIP_PROP_ROOTREDCOST_H__
    42
    43#include "scip/def.h"
    44#include "scip/type_retcode.h"
    45#include "scip/type_scip.h"
    46
    47#ifdef __cplusplus
    48extern "C" {
    49#endif
    50
    51/** creates the root node reduced cost strengthening propagator and includes it in SCIP
    52 *
    53 * @ingroup PropagatorIncludes
    54 */
    55SCIP_EXPORT
    57 SCIP* scip /**< SCIP data structure */
    58 );
    59
    60#ifdef __cplusplus
    61}
    62#endif
    63
    64#endif
    common defines and data types used in all packages of SCIP
    SCIP_RETCODE SCIPincludePropRootredcost(SCIP *scip)
    type definitions for return codes for SCIP methods
    enum SCIP_Retcode SCIP_RETCODE
    Definition: type_retcode.h:63
    type definitions for SCIP's main datastructure