tau_factor

treams_core::special::legendre

Function tau_factor 

Source 
fn tau_factor<const N: usize>(
    l: i32,
    m: i32,
    [upper, lower]: [Jet<N>; 2],
    cosine: Jet<N>,
) -> Jet<N>
Expand description

tau_l^m / sin(theta)^(|m|-1) for m != 0 from one Legendre recurrence, by DLMF 14.10.5: sin(theta) tau = l cos(theta) P_l^m - (l + m) P_(l-1)^m.