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Bulletin of State University of Education. Series: Physics and Mathematics

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ON THE ORDER OF APPROXIMATION OF FUNCTIONS USING SUMS OF RIESZ

Abstract

Asymptotically exact constants in the estimates of the order of approximation of continuous periodic functions by operators of convolution type through the second modulus of continuity are found. This result is used to construct estimates of approximation of functions by the sums of Riesz.

About the Authors

A. . Baskakov
National research Nuclear University «MEPhI»
Russian Federation


V. . Prostokishin
National research Nuclear University «MEPhI»
Russian Federation


References

1. Баскаков А.В. О некоторых наилучших константах приближения непрерывных функций сингулярными интегралами // Применение функционального анализа в теории приближений. Калинин, 1983. С. 3-12.

2. Schurer F., Steutel F. On the Degree of Approximation by the Operators of de la Vallee – Poussin. –Monatsh.// Math. 1979. 87 , №1. P.53-63

3. Сюсюкалов А.И. Аппроксимативные свойства линейных средних рядов Фурье и сопряженных рядов: Автореф. дис. канд. физ.-мат. наук. Алма-Ата, 1991.


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ISSN 2949-5083 (Print)
ISSN 2949-5067 (Online)