Approximative characteristics of the isotropic classes of periodic functions of many variables

Authors

  • A. S. Romanyuk

Abstract

Exact-order estimates are obtained for the best orthogonal trigonometric approximations of the Besov (B_{p,θ}^r) and Nukol’skii (H_p^r ) classes of periodic functions of many variables in the metric of L_q , 1 ≤ p, q ≤ ∞. We also establish the orders of the best approximations of functions from the same classes in the spaces L_1 and L_{∞} by trigonometric polynomials with the corresponding spectrum.

Published

25.04.2009

Issue

Section

Research articles

How to Cite

Romanyuk, A. S. “Approximative Characteristics of the Isotropic Classes of Periodic Functions of Many Variables”. Ukrains’kyi Matematychnyi Zhurnal, vol. 61, no. 4, Apr. 2009, pp. 513-2, https://umj.imath.kiev.ua/index.php/umj/article/view/3036.