fn endpoint<const DERIVATIVE: bool>(v: f64, m: i32) -> Result<(f64, f64)>Expand description
Exact limits at x = 1: P_ν^m(1) = δ_{m0}; the slope is ν(ν+1)/2 (m = 0), infinite
(|m| = 1), -Γ(ν+3)/(4Γ(ν-1)) (m = 2), -1/4 (m = -2) and zero otherwise.