Function trv::calc_coupling_coeff_2pt#

Function Documentation#

double trv::calc_coupling_coeff_2pt(int ell, int ELL, int m, int M)#

Calculate the coupling coefficient for spherical-harmonic components of full two-point statistics.

The calculated quantity is

\[ (2\ell + 1) (2L + 1) W(\ell, 0, L; m, 0, M) \,. \]

Parameters

ell, ELL, m, M – Wigner 3-j components.

Returns

Coupling coefficient for spherical-harmonic components in two-point statistics.