Scippy

SCIP

Solving Constraint Integer Programs

heur_intshifting.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) */
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. */
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23/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
24
25/**@file heur_intshifting.h
26 * @ingroup PRIMALHEURISTICS
27 * @brief LP rounding heuristic that tries to recover from intermediate infeasibilities, shifts integer variables, and
28 * solves a final LP to calculate feasible values for continuous variables
29 * @author Tobias Achterberg
30 *
31 * This heuristic is similar to the Shifting heuristic (see @ref heur_shifting.h), but it ignores continuous variables
32 * during the shifting phase and solves a final LP to find feasible (and optimal w.r.t. the integer fixings) values for
33 * the continuous variables.
34 */
35
36/*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/
37
38#ifndef __SCIP_HEUR_INTSHIFTING_H__
39#define __SCIP_HEUR_INTSHIFTING_H__
40
41#include "scip/def.h"
42#include "scip/type_retcode.h"
43#include "scip/type_scip.h"
44
45#ifdef __cplusplus
46extern "C" {
47#endif
48
49/** creates the intshifting heuristic and includes it in SCIP
50 *
51 * @ingroup PrimalHeuristicIncludes
52 */
53SCIP_EXPORT
55 SCIP* scip /**< SCIP data structure */
56 );
57
58#ifdef __cplusplus
59}
60#endif
61
62#endif
common defines and data types used in all packages of SCIP
SCIP_RETCODE SCIPincludeHeurIntshifting(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