Scippy

SCIP

Solving Constraint Integer Programs

branch_leastinf.h
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1/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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3/* This file is part of the program and library */
4/* SCIP --- Solving Constraint Integer Programs */
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24
25/**@file branch_leastinf.h
26 * @ingroup BRANCHINGRULES
27 * @brief least infeasible LP branching rule
28 * @author Tobias Achterberg
29 *
30 * The least infeasible branching rule selects a candidate variable $j$ with fractional solution value \f$ \hat{x}_j\f$
31 * which maximizes
32 * \f[
33 * \max \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 already is closest to being integral among all branching candidates.
36 *
37 * The least infeasible 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/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
46
47#ifndef __SCIP_BRANCH_LEASTINF_H__
48#define __SCIP_BRANCH_LEASTINF_H__
49
50
51#include "scip/def.h"
52#include "scip/type_retcode.h"
53#include "scip/type_scip.h"
54
55#ifdef __cplusplus
56extern "C" {
57#endif
58
59/** creates the least infeasible LP branching rule and includes it in SCIP
60 *
61 * @ingroup BranchingRuleIncludes
62 */
63SCIP_EXPORT
65 SCIP* scip /**< SCIP data structure */
66 );
67
68#ifdef __cplusplus
69}
70#endif
71
72#endif
common defines and data types used in all packages of SCIP
SCIP_RETCODE SCIPincludeBranchruleLeastinf(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