On the spectra of non-selfadjoint differential operators and their adjoints in direct sum spaces

DOI10.1155/S0161171203007841zbMath1023.34076MaRDI QIDQ1864294

Sobhy El-Sayed Ibrahim

Publication date: 17 March 2003

Published in: International Journal of Mathematics and Mathematical Sciences (Search for Journal in Brave)

Full work available at URL: https://eudml.org/doc/50377

zbMATH Keywords

complex coefficientspoint spectrageneral ordinary quasidifferential expressionregularity fields of general differential operators

Mathematics Subject Classification ID

General spectral theory of ordinary differential operators (34L05) General theory of ordinary differential operators (47E05) Eigenvalues, estimation of eigenvalues, upper and lower bounds of ordinary differential operators (34L15)

Related Items (2)

Representation results for operators generated by quasi-differential multi-interval system in a Hilbert direct sum space ⋮ On spectral resolutions connected with self-adjoint differential vector-operators in a Hilbert space

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