Some extensions to the standard cmath library.
This file includes the standard math library (cmath). 
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| const long double | E = 2.7182818284590452353602874713526625L | 
|  | The Euler constant. 
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| const long double | LOG2E = 1.4426950408889634073599246810018921L | 
|  | log_2(e) 
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| const long double | LOG10E = 0.4342944819032518276511289189166051L | 
|  | log_10(e) 
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| const long double | LN2 = 0.6931471805599453094172321214581766L | 
|  | ln(2) 
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| const long double | LN10 = 2.3025850929940456840179914546843642L | 
|  | ln(10) 
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| const long double | PI = 3.1415926535897932384626433832795029L | 
|  | pi 
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| const long double | PI_2 = 1.5707963267948966192313216916397514L | 
|  | pi/2 
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| const long double | PI_4 = 0.7853981633974483096156608458198757L | 
|  | pi/4 
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| const long double | SQRT2 = 1.4142135623730950488016887242096981L | 
|  | sqrt(2) 
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| const long double | SQRT1_2 = 0.7071067811865475244008443621048490L | 
|  | 1/sqrt(2) 
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