Investigates Fourier coefficients and series in Vilenkin systems, indicating strong universality properties.
This paper is devoted to studying the behavior of Fourier coefficients and Fourier series in the multiplicative systems of corrected functions. The article also constructs an integrable function and a set that possess the property of strong universality with respect to the Vilenkin system.
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Grigoryan et al. (2026) studied this question.
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