Hilbert and Bessel properties of systems of root functions of \(2m\)th-order operators

DOI10.1023/A:1019286330493zbMath1038.47012OpenAlexW164359326MaRDI QIDQ5951176

N. V. Assonova

Publication date: 2001

Published in: Differential Equations (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1023/a:1019286330493

zbMATH Keywords

Hilbert spaceeigenfunctionsroot functionsBessel propertiesHilbert properties

Mathematics Subject Classification ID

General theory of ordinary differential operators (47E05) Eigenfunctions, eigenfunction expansions, completeness of eigenfunctions of ordinary differential operators (34L10) (Generalized) eigenfunction expansions of linear operators; rigged Hilbert spaces (47A70)

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