Scippy

SCIP

Solving Constraint Integer Programs

heur_shiftandpropagate.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) 2002-2022 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 heur_shiftandpropagate.h
17  * @ingroup PRIMALHEURISTICS
18  * @brief preroot heuristic that alternatingly fixes variables and propagates domains
19  * @author Timo Berthold
20  * @author Gregor Hendel
21  *
22  * Preroot primal heuristic that fixes variables and propagates these fixings. In each step, the heuristic fixes a
23  * variable such that the number of violated LP rows gets maximally reduced. The fixing is then propagated to reduce
24  * further variable domains. In case that the domain propagation detects the infeasibility of the current partial
25  * solution, the domain is reset to its previous state and the variable is postponed.
26  */
27 
28 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
29 
30 #ifndef __SCIP_HEUR_SHIFTANDPROPAGATE_H__
31 #define __SCIP_HEUR_SHIFTANDPROPAGATE_H__
32 
33 #include "scip/def.h"
34 #include "scip/type_retcode.h"
35 #include "scip/type_scip.h"
36 
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40 
41 /** creates the shiftandpropagate primal heuristic and includes it in SCIP
42  *
43  * @ingroup PrimalHeuristicIncludes
44  */
45 SCIP_EXPORT
47  SCIP* scip /**< SCIP data structure */
48  );
49 
50 #ifdef __cplusplus
51 }
52 #endif
53 
54 #endif
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_RETCODE SCIPincludeHeurShiftandpropagate(SCIP *scip)
common defines and data types used in all packages of SCIP