Function trv::calc_coupling_coeff_3pt#

Function Documentation#

double trv::calc_coupling_coeff_3pt(int ell1, int ell2, int ELL, int m1, int m2, int M)#

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

The calculated quantity is

\[ (2\ell_1 + 1) (2\ell_2 + 1) (2L + 1) W(\ell_1, \ell_2, L; 0, 0, 0) W(\ell_1, \ell_2, L; m, 0, M) \,. \]

Parameters

ell1, ell2, ELL, m1, m2, M – Wigner 3-j components.

Returns

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