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Izvestiya Vysshikh Uchebnykh Zavedenii. Matematika, 2022, Number 3, Pages 44–60
DOI: https://doi.org/10.26907/0021-3446-2022-3-44-60
(Mi ivm9759)
 

This article is cited in 9 scientific papers (total in 9 papers)

Conjugate rational Foutier–Chebyshev operator and its approximation properties

P. G. Potseiko, Ye. A. Rovba

Yanka Kupala State University of Grodno, 22 Ozheshko str., Grodno, 230023 Republic of Belarus
Full-text PDF (446 kB) Citations (9)
References:
Abstract: In this paper, a conjugate rational integral Fourier–Chebyshev operator associated with the system of Chebyshev–Markov algebraic fractions is constructed. Pointwise estimates of approximations on the segment $[-1,~1]$ of the conjugate function with density $(1-x)^{\gamma}, \gamma>1/2,$ and uniform estimates of approximations expressed in terms of a certain majorant are obtained. Asymptotic expression for majorants of approximations and optimal values of parameters that provide the highest speed decreasing majorants are found. At the corollary the corresponding estimates of approximations on the segment $[-1,~1]$ of the conjugate function under study by partial sums of conjugate polynomial Fourier–Chebyshev series are given.
Keywords: conjugate function, integral operator, rational approximation, pointwise estimate, asymptotic estimate, best approximation.
Funding agency Grant number
ГПНИ "Конвергенция-2020" 20162269
Received: 24.06.2021
Revised: 20.07.2021
Accepted: 29.09.2021
English version:
Russian Mathematics (Izvestiya VUZ. Matematika), 2022, Volume 66, Issue 3, Pages 35–49
DOI: https://doi.org/10.3103/S1066369X22030094
Document Type: Article
UDC: 517.5
Language: Russian
Citation: P. G. Potseiko, Ye. A. Rovba, “Conjugate rational Foutier–Chebyshev operator and its approximation properties”, Izv. Vyssh. Uchebn. Zaved. Mat., 2022, no. 3, 44–60; Russian Math. (Iz. VUZ), 66:3 (2022), 35–49
Citation in format AMSBIB
\Bibitem{PotRov22}
\by P.~G.~Potseiko, Ye.~A.~Rovba
\paper Conjugate rational Foutier--Chebyshev operator and its approximation properties
\jour Izv. Vyssh. Uchebn. Zaved. Mat.
\yr 2022
\issue 3
\pages 44--60
\mathnet{http://mi.mathnet.ru/ivm9759}
\crossref{https://doi.org/10.26907/0021-3446-2022-3-44-60}
\transl
\jour Russian Math. (Iz. VUZ)
\yr 2022
\vol 66
\issue 3
\pages 35--49
\crossref{https://doi.org/10.3103/S1066369X22030094}
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  • This publication is cited in the following 9 articles:
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