Quantization of black holes

A simple argument is presented in favour of the equidistant spectrum for the horizon area of a black hole in semiclassical limit. The following quantization rules for the mass MN and horizon area ANj are proposed:MN=mp [N(N+1)]1/4 ; ANj=8πlp2N(N+1)+N(N+1)−j(j+1) .Here both N and j are nonnegative integers or half-integers.