spec_math 0.1.6

Rust implementations of special mathematical functions. Includes re-implementation of the CEPHES math library for gamma functions, error functions, elliptic integrals, sine and cosine integrals, fresnel integrals, normal distribution, and bessel functions
Documentation 
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

#![allow(clippy::excessive_precision)]

pub const M_E: f64 = 2.71828182845904523536;
pub const M_2_PI: f64 = 0.63661977236758134308;  /* 2/pi */
pub const M_PI: f64 = 3.14159265358979323846;
pub const M_PI_2: f64 = 1.57079632679489661923;
pub const M_PI_4: f64 = 0.785398163397448309616;

pub const MACHEP: f64 = 1.11022302462515654042E-16;

// #ifdef DENORMAL
pub const MAXLOG: f64 = 7.09782712893383996732E2;	/* log(DBL_MAX) */
pub const MINLOG: f64 = -7.451332191019412076235E2;	/* log(2**-1075) */
// #else
// pub const MAXLOG: f64 = 7.08396418532264106224E2;	/* log 2**1022 */
// pub const MINLOG: f64 = -7.08396418532264106224E2;	/* log 2**-1022 */
// #endif

pub const SQ2OPI: f64 = 7.9788456080286535587989E-1;	/* sqrt( 2/pi ) */
pub const LOGSQ2: f64 = 3.46573590279972654709E-1;	/* log(2)/2 */
pub const THPIO4: f64 = 2.35619449019234492885;	/* 3*pi/4 */

pub const M_2_SQRTPI: f64 = 1.12837916709551257390;
pub const M_SQRT2: f64 = 1.41421356237309504880;
pub const M_SQRT1_2: f64 = 0.707106781186547524401;

pub const EULER: f64 = 0.577215664901532860606512090082402431;   /* Euler constant */