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scientific article; zbMATH DE number 219917 - MaRDI portal

scientific article; zbMATH DE number 219917

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Publication:4695804

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zbMath0788.34082MaRDI QIDQ4695804

V. D. Budaev

Publication date: 29 June 1993

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

Bessel system differential operator Bessel inequality unconditional basis property Riesz basis property systems of root functions

Mathematics Subject Classification ID

Eigenvalues, estimation of eigenvalues, upper and lower bounds of ordinary differential operators (34L15)

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