pub fn cgmy_log_cf(
u: &Complex<f64>,
c: f64,
g: f64,
m: f64,
y: f64
) -> Complex<f64>
Returns log of CGMY characteristic function
See cgmy pg 10
extern crate num_complex;
use num_complex::Complex;
extern crate cf_functions;
let u = Complex::new(1.0, 1.0);
let c = 0.5;
let g = 4.0;
let m = 3.0;
let y = 0.6;
let log_cf = cf_functions::cgmy_log_cf(
&u, c, g, m, y
);