On Approximation Characteristics of Some Classes of Functions of Small Smoothness

被引:0
|
作者
Radomskii, A. O. [1 ]
机构
[1] Russian Acad Sci, Steklov Math Inst, Moscow, Russia
基金
俄罗斯科学基金会;
关键词
entropy number; Kolmogorov width; trigonometric polynomial; TRIGONOMETRIC POLYNOMIALS; ENTROPY NUMBERS;
D O I
10.1134/S0037446618030114
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We find the exact order of the entropy numbers and the Kolmogorov widths of a class of functions defined by a condition on the uniform norm of blocks of the Fourier series taken over a lacunar sequence of indices. This result generalizes a result by B. S. Kashin and V. N. Temlyakov.
引用
收藏
页码:486 / 493
页数:8
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