scientific article; zbMATH DE number 2069256

zbMATH Open1058.47043MaRDI QIDQ4463161

Sobhy El-Sayed Ibrahim

Publication date: 27 May 2004

Title of this publication is not available (Why is that?)

zbMATH Keywords

essential spectradirect sum spacesregularly solvable operatorsquasi-differential expressionsjoint field of regularity

Mathematics Subject Classification ID

Spectrum, resolvent (47A10) General spectral theory of ordinary differential operators (34L05) General theory of ordinary differential operators (47E05)

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