/usr/include/dlib/numeric_constants.h is in libdlib-dev 18.18-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 | //Copyright (C) 2013 Steve Taylor (steve98654@gmail.com), Davis E. King
//License: Boost Software License. See LICENSE.txt for full license.
#ifndef DLIB_NUMERIC_CONSTANTs_H_
#define DLIB_NUMERIC_CONSTANTs_H_
namespace dlib
{
// pi -- Pi
const double pi = 3.1415926535897932385;
// e -- Euler's Constant
const double e = 2.7182818284590452354;
// sqrt_2 -- The square root of 2
const double sqrt_2 = 1.4142135623730950488;
// sqrt_3 -- The square root of 3
const double sqrt_3 = 1.7320508075688772935;
// log10_2 -- The logarithm base 10 of two
const double log10_2 = 0.30102999566398119521;
// light_spd -- The speed of light in vacuum in meters per second
const double light_spd = 2.99792458e8;
// newton_G -- Newton's gravitational constant (in metric units of m^3/(kg*s^2))
const double newton_G = 6.67384e-11;
// planck_cst -- Planck's constant (in units of Joules * seconds)
const double planck_cst = 6.62606957e-34;
// golden_ratio -- The Golden Ratio
const double golden_ratio = 1.6180339887498948482;
// euler_gamma -- The Euler Mascheroni Constant
const double euler_gamma = 0.5772156649015328606065;
// catalan -- Catalan's Constant
const double catalan = 0.91596559417721901505;
// glaisher -- Glaisher Kinkelin constant
const double glaisher = 1.2824271291006226369;
// khinchin -- Khinchin's constant
const double khinchin = 2.6854520010653064453;
// apery -- Apery's constant
const double apery = 1.2020569031595942854;
}
#endif //DLIB_NUMERIC_CONSTANTs_H_
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