Formation and evolution of black holes

A two-stage model of the process of the emergence of black holes and their evolution after the Big Bang until their complete disappearance is proposed. The model is based on a description of this process using the Fokker-Planck equation (or, what is the same, the direct Kolmogorov equation). It is shown that at the first stage the entropy of holes increases, and by the end of the second stage it drops to zero and at the same time the black hole ceases to exist.