Lacunary sequences in analysis, probability and number theory

Aistleitner, Christoph and Berkes, István and Tichy, Robert (2023) Lacunary sequences in analysis, probability and number theory. LECTURE NOTES IN MATHEMATICS. ISSN 0075-8434

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Abstract

In this paper we present the theory of lacunary trigonometric sums and lacunary sums of dilated functions, from the origins of the subject up to recent developments. We describe the connections with mathematical topics such as equidistribution and discrepancy, metric number theory, normality, pseudorandomness, Diophantine equations, and the subsequence principle. In the final section of the paper we prove new results which provide necessary and sufficient conditions for the central limit theorem for subsequences, in the spirit of Nikishin’s resonance theorem for convergence systems. More precisely, we characterize those sequences of random variables which allow to extract a subsequence satisfying a strong form of the central limit theorem.

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