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The expansion theorem for singular self-adjoint linear differential operators - MaRDI portal

The expansion theorem for singular self-adjoint linear differential operators

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Publication:2651800

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DOI10.2307/1969695zbMath0055.31605OpenAlexW2334519767MaRDI QIDQ2651800

Norman Levinson

Publication date: 1954

Published in: Annals of Mathematics. Second Series (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.2307/1969695

zbMATH Keywords

ordinary differential equations

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