A mapping of random number triples to points in spherical coordinates according to θ | = | 2π X_n ϕ | = | π X_(n + 1) r | = | sqrt(X_(n + 2)) in order to detect unexpected structure indicating correlations between triples. When such structure is present (note that this does not include the expected bunching of points along the z-axis according to the factor sin ϕ in the spherical volume element), numbers may not be truly random.

ball point picking | random number | sphere point picking