A Nonlinear Dynamical System on the Set of Laguerre Entire Functions

Abstract

A nonlinear modification of a parabolic Cauchy problem for entire functions of a single complex variable is considered. The modification means that the time half-line is divided onto the intervals of equal length and on each such interval the evolution is to be described by the mentioned equation but at the endpoints the function is changed in a nonlinear way. If the initial function is chosen in the set of Laguerre entire functions, then the solution of the problem remains in this set. The Laguerre entire functions are obtained as uniform limits on compact subsets of the complex plane of the polynomials having real nonpositive zeros only. It is shown that the asymptotic properties of the solution change considerably when interval length reaches a threshold value. Certain applications, including limit theorems for weakly and strongly dependent random vectors, are given.