Fejér summability of generalized Fourier series associated with differential operators.

zbMath1090.34601MaRDI QIDQ1432705

A. I. Vagabov, V. S. Galyaev

Publication date: 15 June 2004

Published in: Doklady Mathematics (Search for Journal in Brave)

Mathematics Subject Classification ID

Convergence and divergence of series and sequences (40A05) General theory of ordinary differential operators (47E05) Eigenfunctions, eigenfunction expansions, completeness of eigenfunctions of ordinary differential operators (34L10) Fourier coefficients, Fourier series of functions with special properties, special Fourier series (42A16) Eigenvalues, estimation of eigenvalues, upper and lower bounds of ordinary differential operators (34L15)

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