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JOURNALS // Trudy Instituta Matematiki i Mekhaniki UrO RAN // Archive

Trudy Inst. Mat. i Mekh. UrO RAN, 2024 Volume 30, Number 4, Pages 286–300 (Mi timm2145)

Integer expansion of elements from spaces of nonintegrable functions into Fourier-type series in systems of contractions and shifts of one function

V. I. Filippov

Stolypin Volga Region Institute

Abstract: We present results on the expansion of elements of the spaces $L_p(0,1)$, $0 <p <1 $, into systems of functions that are contractions and shifts of one function. New algorithms are designed for the expansion of functions into Fourier-type series in these systems with integer coefficients. The expansions produced by the proposed methods have the property of image compression, i.e., a large number of expansion coefficients are zeros. The results may be of interest to specialists in the transmission and processing of digital information and to other researchers who have a need to expand nonintegrable functions into series in systems of contractions and shifts of one function.

Keywords: functional systems of contractions and shifts of one function of the space $L_p (0,1)$ with $0<p<1$, Fourier-type series with integer coefficients, digital processing, information transmission.

UDC: 517.51

Received: 21.08.2024
Revised: 04.11.2024
Accepted: 18.11.2024

DOI: 10.21538/0134-4889-2024-30-4-286-300



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© Steklov Math. Inst. of RAS, 2025