Spherical Harmonics Transforms

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map2alm(map, lmax, mmax, nthreads, zbounds)	Computes alms from a temperature map.
map2alm_spin(map, spin, lmax, mmax, …)	Computes alms from a temperature map.
alm2map(alm, nside, lmax, mmax, nthreads, …)	Computes a Healpix temperature map from alm.
alm2map_spin(alm, spin, nside, lmax, mmax, …)	Computes a Healpix polarisation map from alm.
healpix_geometry(nside, stride)	Creates a HEALPix geometry given the nside.