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 sepa_closecuts.h 26 * @ingroup SEPARATORS 27 * @brief closecuts meta separator 28 * @author Marc Pfetsch 29 * 30 * This separator generates a convex combination of the current LP solution and either the best 31 * primal feasible solution or an interior point of the LP relaxation. If the convex combination is 32 * proper, the new point is closer to the convex hull of the feasible points. The separator then 33 * calls all other separators to separate this point. The idea is that in this way possibly "deeper" 34 * cuts are generated. Note, however, that the new point is not a basic solution, i.e., separators 35 * relying basis information, e.g., Gomory cuts, will not work. 36 */ 37 38 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/ 39 40 #ifndef __SCIP_SEPA_CLOSECUTS_H__ 41 #define __SCIP_SEPA_CLOSECUTS_H__ 42 43 44 #include "scip/def.h" 45 #include "scip/type_retcode.h" 46 #include "scip/type_scip.h" 47 #include "scip/type_sol.h" 48 49 #ifdef __cplusplus 50 extern "C" { 51 #endif 52 53 /** creates the closecuts separator and includes it in SCIP 54 * 55 * @ingroup SeparatorIncludes 56 */ 57 SCIP_EXPORT 58 SCIP_RETCODE SCIPincludeSepaClosecuts( 59 SCIP* scip /**< SCIP data structure */ 60 ); 61 62 /**@addtogroup SEPARATORS 63 * 64 * @{ 65 */ 66 67 /** sets point to be used as base point for computing the point to be separated 68 * 69 * The point is only stored if separation of relative interior points is used. The solution is copied. 70 */ 71 SCIP_EXPORT 72 SCIP_RETCODE SCIPsetBasePointClosecuts( 73 SCIP* scip, /**< SCIP data structure */ 74 SCIP_SOL* sol /**< base point solution */ 75 ); 76 77 /** @} */ 78 79 #ifdef __cplusplus 80 } 81 #endif 82 83 #endif 84