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