Abstract
We obtain a series of concrete results establishing a somewhat unexpected connection between the asymptotic representation theory of symmetric groups and the classical results for one-dimensional problems of mathematical physics and function theory. In particular: (1) The universal character of the division of roots for a wide class of orthogonal polynomials is shown. (2) A connection between the Plancherel measure of the infinite symmetric group and Markov's moment problem is established. (3) Asymptotics of the Plancherel measure turns out to be connected with the soliton-like solution of the simplest quasilinear equation, R′t+RR′x=0. Bibliography: 14 titles.
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