Internal and undocumented low-level utilities for sphunif.
n_from_dist_vector(n_dist) t_inv_sqrt_one(t)
n_dist
a positive integer (n - 1) * n / 2 for which n is to be recovered.
(n - 1) * n / 2
n
t
a vector to evaluate t / \sqrt{1 - t^2}.
t / \sqrt{1 - t^2}