Rogosinsky-Bernstein Polynomial Method of Summation of Trigonometric Fourier Series

被引:2
|
作者
Trigub, R. M. [1 ]
机构
[1] Donetsk Natl Univ, UA-83114 Donetsk, Ukraine
关键词
series and Fourier transforms; Hardy's inequality; Riesz means; Lebesgue points (l-points) and d-points; modulus of smoothness; linearized modulus of smoothness; Jackson's theorem; Vallee-Poussin polynomial; conjugate function; entire functions of exponential type; comparison principle; Marcinkiewicz's inequality and discretization;
D O I
10.1134/S0001434622030294
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
General Rogosinsky-Bernstein linear polynomial means R-n(f) of Fourier series are introduced and three convergence criteria as n -> infinity are obtained: for convergence in the space C of continuous periodic functions and for convergence almost everywhere with two guaranteed sets (Lebesgue points and d-points). For smooth functions, the rate of convergence in norm of R-n(f), as well as of their interpolation analogues, is also studied. For approximation of functions in C-T, the asymptotics is found along with the rate of decrease of the remainder term.
引用
收藏
页码:604 / 615
页数:12
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