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JOURNALS // Trudy Matematicheskogo Instituta imeni V.A. Steklova // Archive

Trudy Mat. Inst. Steklova, 2023 Volume 323, Pages 213–223 (Mi tm4359)

This article is cited in 1 paper

On Universal Sampling Recovery in the Uniform Norm

V. N. Temlyakovabcd

a Steklov Mathematical Institute of Russian Academy of Sciences, ul. Gubkina 8, Moscow, 119991 Russia
b Lomonosov Moscow State University, Moscow, 119991 Russia
c Moscow Center for Fundamental and Applied Mathematics, Moscow, 119991 Russia
d University of South Carolina, Columbia, SC 29208, USA

Abstract: It is known that results on universal sampling discretization of the square norm are useful in sparse sampling recovery with error measured in the square norm. In this paper we demonstrate how known results on universal sampling discretization of the uniform norm and recent results on universal sampling representation allow us to provide good universal methods of sampling recovery for anisotropic Sobolev and Nikol'skii classes of periodic functions of several variables. The sharpest results are obtained in the case of functions of two variables, where the Fibonacci point sets are used for recovery.

Keywords: sampling discretization, universality, recovery.

UDC: 517.5

MSC: Primary 65J05; Secondary 42A05, 65D30, 41A63

Received: May 17, 2023
Revised: July 16, 2023
Accepted: July 20, 2023

DOI: 10.4213/tm4359


 English version:
Proceedings of the Steklov Institute of Mathematics, 2023, 323, 206–216

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© Steklov Math. Inst. of RAS, 2025