This article is cited in 4 papers

Brief Communications

Best Polynomial Approximations and Widths of Classes of Functions in the Space $L_2$

S. B. Vakarchuk

Alfred Nobel University Dnepropetrovsk

Keywords: best polynomial approximation, Fourier series, $(\psi,\beta)$-derivative, generalized modulus of continuity, $n$-width.

Received: 23.08.2017

DOI: 10.4213/mzm11764

 English version: Mathematical Notes, 2018, 103:2, 308–312

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