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 nlhdlr_convex.h 26 * @ingroup NLHDLRS 27 * @brief nonlinear handlers for convex and concave expressions, respectively 28 * @author Benjamin Mueller 29 * @author Stefan Vigerske 30 */ 31 32 /*---+----1----+----2----+----3----+----4----+----5----+----6----+----7----+----8----+----9----+----0----+----1----+----2*/ 33 34 #ifndef __SCIP_NLHDLR_CONVEX_H__ 35 #define __SCIP_NLHDLR_CONVEX_H__ 36 37 #include "scip/scip.h" 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 /** includes convex nonlinear handler in nonlinear constraint handler 44 * 45 * @ingroup NlhdlrIncludes 46 */ 47 SCIP_EXPORT 48 SCIP_RETCODE SCIPincludeNlhdlrConvex( 49 SCIP* scip /**< SCIP data structure */ 50 ); 51 52 /** includes concave nonlinear handler in nonlinear constraint handler 53 * 54 * @ingroup NlhdlrIncludes 55 */ 56 SCIP_EXPORT 57 SCIP_RETCODE SCIPincludeNlhdlrConcave( 58 SCIP* scip /**< SCIP data structure */ 59 ); 60 61 /**@addtogroup NLHDLRS 62 * @{ 63 * 64 * @name Convex and concave nonlinear handlers 65 * 66 * These nonlinear handler detect convex and concave subexpressions and provide specialized estimation functionality. 67 * 68 * @{ 69 */ 70 71 /** checks whether a given expression is convex or concave w.r.t. the original variables 72 * 73 * This function uses the methods that are used in the detection algorithm of the convex nonlinear handler. 74 */ 75 SCIP_EXPORT 76 SCIP_RETCODE SCIPhasExprCurvature( 77 SCIP* scip, /**< SCIP data structure */ 78 SCIP_EXPR* expr, /**< expression */ 79 SCIP_EXPRCURV curv, /**< curvature to check for */ 80 SCIP_Bool* success, /**< buffer to store whether expression has curvature curv (w.r.t. original variables) */ 81 SCIP_HASHMAP* assumevarfixed /**< hashmap containing variables that should be assumed to be fixed, or NULL */ 82 ); 83 84 /** @} 85 * @} 86 */ 87 88 #ifdef __cplusplus 89 } 90 #endif 91 92 #endif /* __SCIP_NLHDLR_CONVEX_H__ */ 93