A remark on Kolmogorov's comparison theorem

zbMath0628.41015MaRDI QIDQ1093114

Yong Sheng Sun

Publication date: 1986

Published in: Chinese Annals of Mathematics. Series B (Search for Journal in Brave)

zbMATH Keywords

analytic function classKolmogorov's N-widths

Mathematics Subject Classification ID

Inequalities in approximation (Bernstein, Jackson, Nikol'ski?-type inequalities) (41A17) Approximation by arbitrary nonlinear expressions; widths and entropy (41A46)

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Comparison theorems of Kolmogorov type and exact values of 𝑛-widths on Hardy–Sobolev classes