Scippy

SCIP

Solving Constraint Integer Programs

branch_lookahead.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) 2002-2021 Konrad-Zuse-Zentrum */
7 /* fuer Informationstechnik Berlin */
8 /* */
9 /* SCIP is distributed under the terms of the ZIB Academic License. */
10 /* */
11 /* You should have received a copy of the ZIB Academic License */
12 /* along with SCIP; see the file COPYING. If not visit scipopt.org. */
13 /* */
14 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
15 
16 /**@file branch_lookahead.h
17  * @ingroup BRANCHINGRULES
18  * @brief lookahead LP branching rule
19  * @author Christoph Schubert
20  * @author Gerald Gamrath
21  *
22  * The (multi-level) lookahead branching rule applies strong branching to every fractional value of the LP solution
23  * at the current node of the branch-and-bound tree, as well as recursivly to every temporary child problem created by this
24  * strong branching. The rule selects the candidate with the best proven dual bound.
25  *
26  * The branching rule was motivated by the following technical report:
27  *
28  * @par
29  * Wasu Glankwamdee and Jeff Linderoth@n
30  * Lookahead Branching for Mixed Integer Programming@n
31  * Technical Report 06T-004, Department of Industrial and Systems Engineering, Lehigh University.
32  *
33  * For a more mathematical description and a comparison between lookahead branching and other branching rules
34  * in SCIP, we refer to
35  *
36  * @par
37  * Christoph Schubert@n
38  * Multi-Level Lookahead Branching@n
39  * Master Thesis, Technische Universit├Ąt Berlin, 2017@n
40  */
41 
42 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
43 
44 #ifndef __SCIP_BRANCH_LOOKAHEAD_H__
45 #define __SCIP_BRANCH_LOOKAHEAD_H__
46 
47 
48 #include "scip/def.h"
49 #include "scip/type_retcode.h"
50 #include "scip/type_scip.h"
51 
52 #ifdef __cplusplus
53 extern "C" {
54 #endif
55 
56 /** creates the lookahead branching rule and includes it in SCIP */
59  SCIP* scip /**< SCIP data structure */
60  );
61 
62 #ifdef __cplusplus
63 }
64 #endif
65 
66 #endif
#define SCIP_EXPORT
Definition: def.h:100
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:54
type definitions for return codes for SCIP methods
type definitions for SCIP&#39;s main datastructure
SCIP_EXPORT SCIP_RETCODE SCIPincludeBranchruleLookahead(SCIP *scip)
common defines and data types used in all packages of SCIP