Brief Communications

Jackson Theorem in the Space $L_2$ on the Interval $[-1,1]$ with Power-Law Weight

V. I. Ivanov^a, D. V. Chertova^a, Liu Yongping<sup>b

a</sup> Tula State University
^b Beijing Normal University

Keywords: Sturm–Liouville problem, best approximation, Hilbert space, Bessel function, modulus of continuity, Fourier series.

Received: 19.02.2008

DOI: 10.4213/mzm5197

 English version: Mathematical Notes, 2008, 84:1, 134–136

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