A criterion for the Bessel property of systems of the form \(\{\exp (i\lambda_n t)\sin (\mu_n t)\}\) and \(\{\exp (i\lambda_n t)\cos (\mu_n t)\}\)

DOI10.1007/BF02754403zbMath0988.34063MaRDI QIDQ5942169

A. V. Konashenko

Publication date: 26 June 2002

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

zbMATH Keywords

unconditional basisquadratic operator pencilBessel propertyCarleman conditions

Mathematics Subject Classification ID

Functions whose values are linear operators (operator- and matrix-valued functions, etc., including analytic and meromorphic ones) (47A56) Eigenfunctions, eigenfunction expansions, completeness of eigenfunctions of ordinary differential operators (34L10) Approximation by other special function classes (41A30)

Cites Work

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