Scippy

    SCIP

    Solving Constraint Integer Programs

    branch_inference.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 */
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    12/* http://www.apache.org/licenses/LICENSE-2.0 */
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    14/* Unless required by applicable law or agreed to in writing, software */
    15/* distributed under the License is distributed on an "AS IS" BASIS, */
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    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. */
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    23/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    24
    25/**@file branch_inference.h
    26 * @ingroup BRANCHINGRULES
    27 * @brief inference history branching rule
    28 * @author Tobias Achterberg
    29 * @author Timo Berthold
    30 * @author Stefan Heinz
    31 *
    32 * The inference history branching rule is based on the average number of deductions obtained after
    33 * branching this variable upwards and downwards.
    34 * Variables which cause many problem reductions are preferred since they are more likely to drive
    35 * the created sub-tree towards infeasibility.
    36 * Inference history of the variables is updated during the branch-and-bound search.
    37 *
    38 * For a more detailed description and a comparison between the inference rule and other branching rules
    39 * in SCIP, we refer to
    40 *
    41 * @par
    42 * Tobias Achterberg@n
    43 * Constraint Integer Programming@n
    44 * PhD Thesis, Technische Universität Berlin, 2007@n
    45 *
    46
    47 */
    48
    49/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
    50
    51#ifndef __SCIP_BRANCH_INFERENCE_H__
    52#define __SCIP_BRANCH_INFERENCE_H__
    53
    54
    55#include "scip/def.h"
    56#include "scip/type_retcode.h"
    57#include "scip/type_scip.h"
    58
    59#ifdef __cplusplus
    60extern "C" {
    61#endif
    62
    63/** creates the inference history branching rule and includes it in SCIP
    64 *
    65 * @ingroup BranchingRuleIncludes
    66 */
    67SCIP_EXPORT
    69 SCIP* scip /**< SCIP data structure */
    70 );
    71
    72#ifdef __cplusplus
    73}
    74#endif
    75
    76#endif
    common defines and data types used in all packages of SCIP
    SCIP_RETCODE SCIPincludeBranchruleInference(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