[68] | 1 | /* -*- C++ -*- |
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| 2 | * |
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| 3 | * This file is a part of LEMON, a generic C++ optimization library |
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| 4 | * |
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| 5 | * Copyright (C) 2003-2008 |
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| 6 | * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport |
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| 7 | * (Egervary Research Group on Combinatorial Optimization, EGRES). |
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| 8 | * |
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| 9 | * Permission to use, modify and distribute this software is granted |
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| 10 | * provided that this copyright notice appears in all copies. For |
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| 11 | * precise terms see the accompanying LICENSE file. |
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| 12 | * |
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| 13 | * This software is provided "AS IS" with no warranty of any kind, |
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| 14 | * express or implied, and with no claim as to its suitability for any |
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| 15 | * purpose. |
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| 16 | * |
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| 17 | */ |
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| 18 | |
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| 19 | #ifndef LEMON_MATH_H |
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| 20 | #define LEMON_MATH_H |
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| 21 | |
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| 22 | ///\ingroup misc |
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| 23 | ///\file |
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| 24 | ///\brief Some extensions to the standard \c cmath library. |
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| 25 | /// |
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| 26 | ///Some extensions to the standard \c cmath library. |
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| 27 | /// |
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| 28 | ///This file includes the standard math library (cmath). |
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| 29 | |
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| 30 | #include<cmath> |
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| 31 | |
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| 32 | namespace lemon { |
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| 33 | |
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| 34 | /// \addtogroup misc |
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| 35 | /// @{ |
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| 36 | |
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| 37 | /// The Euler constant |
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| 38 | const long double E = 2.7182818284590452353602874713526625L; |
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| 39 | /// log_2(e) |
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| 40 | const long double LOG2E = 1.4426950408889634073599246810018921L; |
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| 41 | /// log_10(e) |
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| 42 | const long double LOG10E = 0.4342944819032518276511289189166051L; |
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| 43 | /// ln(2) |
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| 44 | const long double LN2 = 0.6931471805599453094172321214581766L; |
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| 45 | /// ln(10) |
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| 46 | const long double LN10 = 2.3025850929940456840179914546843642L; |
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| 47 | /// pi |
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| 48 | const long double PI = 3.1415926535897932384626433832795029L; |
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| 49 | /// pi/2 |
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| 50 | const long double PI_2 = 1.5707963267948966192313216916397514L; |
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| 51 | /// pi/4 |
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| 52 | const long double PI_4 = 0.7853981633974483096156608458198757L; |
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| 53 | /// sqrt(2) |
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| 54 | const long double SQRT2 = 1.4142135623730950488016887242096981L; |
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| 55 | /// 1/sqrt(2) |
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| 56 | const long double SQRT1_2 = 0.7071067811865475244008443621048490L; |
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| 57 | |
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| 58 | |
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| 59 | /// @} |
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| 60 | |
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| 61 | } //namespace lemon |
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| 62 | |
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| 63 | #endif //LEMON_TOLERANCE_H |
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