Python/numba implementation of Wigner D Matrices, spin-weighted spherical harmonics, and associated functions
copied from cf-staging / spherical_functionsPython/numba package for evaluating and transforming Wigner’s 𝔇 matrices, Wigner’s 3-j symbols, and spin-weighted (and scalar) spherical harmonics. These functions are evaluated directly in terms of quaternions, as well as in the more standard forms of spherical coordinates and Euler angles.
