Scippy

SCIP

Solving Constraint Integer Programs

branch_mostinf.h
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1/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
2/* */
3/* This file is part of the program and library */
4/* SCIP --- Solving Constraint Integer Programs */
5/* */
6/* Copyright (c) 2002-2024 Zuse Institute Berlin (ZIB) */
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8/* Licensed under the Apache License, Version 2.0 (the "License"); */
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23/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
24
25/**@file branch_mostinf.h
26 * @ingroup BRANCHINGRULES
27 * @brief most infeasible LP branching rule
28 * @author Tobias Achterberg
29 *
30 * The most infeasible branching rule selects a candidate variable $j$ with fractional solution value \f$ \hat{x}_j\f$
31 * which maximizes
32 * \f[
33 * \min \left\{ \lceil \hat{x}_j \rceil - \hat{x}_j, \hat{x}_j - \lfloor \hat{x}_j \rfloor \right\}.
34 * \f]
35 * i. e., a variable which still is farthest from taking an integer value among all branching candidates.
36 *
37 * The most infeasible branching rule and many other branching rules of SCIP are explained and compared in
38 *
39 * @par
40 * Tobias Achterberg@n
41 * Constraint Integer Programming@n
42 * PhD Thesis, Technische Universität Berlin, 2007@n
43 *
44 */
45
46/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
47
48#ifndef __SCIP_BRANCH_MOSTINF_H__
49#define __SCIP_BRANCH_MOSTINF_H__
50
51
52#include "scip/def.h"
53#include "scip/type_retcode.h"
54#include "scip/type_scip.h"
55
56#ifdef __cplusplus
57extern "C" {
58#endif
59
60/** creates the most infeasible LP branching rule and includes it in SCIP
61 *
62 * @ingroup BranchingRuleIncludes
63 */
64SCIP_EXPORT
66 SCIP* scip /**< SCIP data structure */
67 );
68
69#ifdef __cplusplus
70}
71#endif
72
73#endif
common defines and data types used in all packages of SCIP
SCIP_RETCODE SCIPincludeBranchruleMostinf(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