Function stable_random 

pub fn stable_random(alpha: f64, rng: &mut Rng) -> f64

Generate a random variate from a symmetric alpha-stable distribution using the Chambers-Mallows-Stuck (CMS) algorithm.

• alpha - stability parameter in (0, 2]. alpha=2 is Gaussian, alpha=1 is Cauchy.
• rng - random number generator

Returns a sample from S(alpha, 0, 1, 0) (symmetric, unit scale).