A Mathematical Theory of Random Migration

AN interesting but highly mathematical memoir by Prof. Karl Pearson and Mr. J. Blakeman on "A Mathematical Theory of Random Migration" has just been re-issued. The problem dealt with is, in simple terms, the following: - Given that a large number of individuals move by successive straight steps of length x in random directions, starting from one and the same point, required to find their distribution after y such steps. The solution, which is obtained in terms of Bessel functions, is applic...