CouennePrecisions.hpp

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00001 /* $Id: CouennePrecisions.hpp 948 2013-04-25 13:15:04Z stefan $
00002  *
00003  * Name:    CouennePrecisions.hpp
00004  * Author:  Pietro Belotti
00005  * Purpose: constants for evaluation procedures
00006  *
00007  * (C) Carnegie-Mellon University, 2006-10.
00008  * This file is licensed under the Eclipse Public License (EPL)
00009  */
00010 
00011 #ifndef COUENNE_PRECISIONS_HPP
00012 #define COUENNE_PRECISIONS_HPP
00013 
00014 #include <math.h>
00015 
00016 namespace Couenne {
00017 
00018 // must be >= 1e-7
00019 #define COUENNE_EPS           1.e-07
00020 
00021 // to be used in bounds tightening to avoid node pruning due to strict COUENNE_EPS tolerance
00022 #define COUENNE_BOUND_PREC    1.e-5
00023 
00024 // for integrality check
00025 #define COUENNE_EPS_INT       1.e-9
00026 
00027 // for simplification
00028 #define COUENNE_EPS_SIMPL     1.e-20
00029 
00030 // for bounds
00031 #ifndef COUENNE_INFINITY
00032 #define COUENNE_INFINITY      1.e+50
00033 #endif
00034 
00035 // for cuts, ensures stability and scaling in Clp
00036 #define COU_MAX_COEFF     1.e+9
00037 
00038 // for cuts, ditto
00039 #define COU_MIN_COEFF     1.e-9
00040 
00041 // rounds to nearest integer
00042 #define COUENNE_round(x) ((int) (floor ((x) + 0.5)))
00043 
00044 #define MAX_BOUND 1.e45
00045 
00047 const double Couenne_large_bound =  9.999e12;
00048 
00049 }
00050 
00051 #endif
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