descriptionPublicationkeyboard_double_arrow_right Article 01 Jan 2000Publisher:Springer Science and Business Media LLCJournal:Zeitschrift für angewandte Mathematik und Physik, volume 51, page 318 (issn: 0044-2275,

Authors: Lubary Martínez, José Antonio; Solà-Morales Rubió, Joan de;

doi: 10.1007/s000330050201

handle: 2117/789

Some non-selfadjoint problems on the circle

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Abstract

The non-selfadjoint nature of some second order differential equations with periodic boundary conditions is exhibited by describing properties of its spectrum, such as geometric and algebraic multiplicities and existence of nonreal eigenvalues.

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Keywords

Classificació AMS::34 Ordinary differential equations::34B Boundary value problems, multiplicities, General theory of ordinary differential operators, Valors limits, Problemes de, Classificació AMS::47 Operator theory, Problemes de, non-selfadjoint operators, Boundary value problems, Sturm-Liouville theory, :47 Operator theory [Classificació AMS], Valors limits, :34 Ordinary differential equations::34B Boundary value problems [Classificació AMS], Problemes de contorn, nonselfadjoint operators, nonreal eigenvalues, periodic boundary conditions

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