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ln_gamma

qualia_core_db::solvers::statistics::distributions::special

Function ln_gamma 

Source 
pub fn ln_gamma(x: f64) -> f64
Expand description

Natural log of the Gamma function, ln Γ(x), via the Lanczos approximation (g = 7, 9 coefficients) with the reflection formula for x < 0.5. Accurate to ~15 significant figures for x > 0.