The discrete universality of the periodic Hurwitz zeta function

Author: Laurincikas A.  

Publisher: Taylor & Francis Ltd

ISSN: 1065-2469

Source: Integral Transforms and Special Functions, Vol.20, Iss.9, 2009-09, pp. : 673-686

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Abstract

The periodic Hurwitz zeta function [image omitted] , s=σ+it, 0<α≤1, is defined, for σ>1, by [image omitted] and by analytic continuation elsewhere. Here {am} is a periodic sequence of complex numbers. In this paper, a discrete universality theorem for the function [image omitted] with a transcendental parameter α is proved. Roughly speaking, this means that every analytic function can be approximated uniformly on compact sets by shifts [image omitted] , where m is a non-negative integer and h is a fixed positive number such that [image omitted] is rational.