/src/lib/numeric/math_constants.e

 1-- This file is part of a Liberty Eiffel library.
 2-- See the full copyright at the end.
 3--
 4expanded class MATH_CONSTANTS
 5   --
 6   -- Platform-independent, universal, mathematical constants.
 7   -- Intended to be used as ancestor for classes that need these constants.
 8   --
 9
10feature {ANY} -- Maths constants:
11   Pi: REAL 3.1415926535897932384626
12         -- Pi
13
14   Pi_2: REAL 1.5707963267948966192313
15         -- Pi divided by 2
16
17   Pi_4: REAL 0.7853981633974483096156
18         -- Pi divided by 4
19
20   Inv_pi: REAL 0.31830988618379067153
21         -- Inverse pi
22
23   Sqr_2pi: REAL 2.50662827463100050241
24         -- Square root of 2 pi
25
26   Tau: REAL 6.2831852707795864769252
27         -- Tau (2Pi)
28
29   Sqr_tau: REAL 2.50662827463100050241
30         -- Square root of Tau
31
32   Evalue: REAL 2.7182818284590452353602
33         -- e (Euler's number)
34
35   Inv_evalue: REAL 0.36787944117144232159
36         -- Inverse e
37
38   Deg: REAL 57.2957795130823208767981
39         -- Degrees/Radian
40
41   Phi: REAL 1.6180339887498948482045
42         -- Golden Ratio
43
44   Cheb: REAL 0.59017029950804811302
45         -- Chebyshev constant
46
47   Zeta_2: REAL 1.64493406684822643647
48         -- Riemann Function
49
50end -- class MATH_CONSTANTS
51--
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