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 branch_mostinf.h 26 * @ingroup BRANCHINGRULES 27 * @brief most infeasible LP branching rule 28 * @author Tobias Achterberg 29 * 30 * The most infeasible branching rule selects a candidate variable $j$ with fractional solution value \f$ \hat{x}_j\f$ 31 * which maximizes 32 * \f[ 33 * \min \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 still is farthest from taking an integer value among all branching candidates. 36 * 37 * The most infeasible branching 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 46 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/ 47 48 #ifndef __SCIP_BRANCH_MOSTINF_H__ 49 #define __SCIP_BRANCH_MOSTINF_H__ 50 51 52 #include "scip/def.h" 53 #include "scip/type_retcode.h" 54 #include "scip/type_scip.h" 55 56 #ifdef __cplusplus 57 extern "C" { 58 #endif 59 60 /** creates the most infeasible LP branching rule and includes it in SCIP 61 * 62 * @ingroup BranchingRuleIncludes 63 */ 64 SCIP_EXPORT 65 SCIP_RETCODE SCIPincludeBranchruleMostinf( 66 SCIP* scip /**< SCIP data structure */ 67 ); 68 69 #ifdef __cplusplus 70 } 71 #endif 72 73 #endif 74