 Let "ws(x)dx" be the probability that the "s"-th era terminates with the value formula_77 lying in a specified interval "dx".The value "x(s)" = "x", which terminates the "s"-th era, can result from initial (for this era) values formula_78, where "k" = 1, 2, ...; these values of formula_79 correspond to the values "x"("s"–1) = 1/("k" + "x") for the preceding era.Noting this, one can write the following recurrence relation, which expresses the distribution of the probabilities "ws(x)" in terms of the distribution "w""s"–1("x")