Properties of spectra on nonnegative self-adjoint extensions of elliptic operators and exact conditions for the convergence and Riesz summability of Fourier series of various classes of functions

DOI10.1007/BF01151708zbMath0202.14501OpenAlexW2322985633MaRDI QIDQ2540929

Vladimir Il'in

Publication date: 1970

Published in: Mathematical Notes (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/bf01151708

Cites Work

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• Localization and summability of multiple Fourier series
• Sur les propriétés asymptotiques des valeurs propres pour les opérateurs elliptiques
• Asymptotic formulas with remainder estimates for eigenvalues of elliptic operators
• Summability of eigenfunction expansions

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