Scippy

SCIP

Solving Constraint Integer Programs

heur_conflictdiving.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) 2002-2023 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 */
11 /* */
12 /* http://www.apache.org/licenses/LICENSE-2.0 */
13 /* */
14 /* Unless required by applicable law or agreed to in writing, software */
15 /* distributed under the License is distributed on an "AS IS" BASIS, */
16 /* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. */
17 /* See the License for the specific language governing permissions and */
18 /* limitations under the License. */
19 /* */
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. */
22 /* */
23 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
24 
25 /**@file heur_conflictdiving.h
26  * @ingroup PRIMALHEURISTICS
27  * @brief LP diving heuristic that chooses fixings w.r.t. conflict locks
28  * @author Jakob Witzig
29  *
30  * Diving heuristic: Iteratively fixes some fractional variable and resolves the LP-relaxation, thereby simulating a
31  * depth-first-search in the tree. Conflict Diving chooses the variable with the fewest conflict locking number in any
32  * direction and rounds it into this direction.
33  */
34 
35 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
36 
37 #ifndef __SCIP_HEUR_CONFLICTDIVING_H__
38 #define __SCIP_HEUR_CONFLICTDIVING_H__
39 
40 #include "scip/def.h"
41 #include "scip/type_retcode.h"
42 #include "scip/type_scip.h"
43 
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47 
48 /** creates the conflictdiving heuristic and includes it in SCIP */
49 SCIP_EXPORT
51  SCIP* scip /**< SCIP data structure */
52  );
53 
54 #ifdef __cplusplus
55 }
56 #endif
57 
58 #endif
enum SCIP_Retcode SCIP_RETCODE
Definition: type_retcode.h:63
type definitions for return codes for SCIP methods
type definitions for SCIP&#39;s main datastructure
SCIP_RETCODE SCIPincludeHeurConflictdiving(SCIP *scip)
common defines and data types used in all packages of SCIP