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Discrete spectrum of perturbed Dirac systems with real and periodic coefficients

Buffoni, Boris

In: Proceedings of the Royal Society of Edinburgh: Section A Mathematics, 1990, vol. 115, no. 3-4, p. 337-347

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    Title
    • Discrete spectrum of perturbed Dirac systems with real and periodic coefficients
    Author
    • Buffoni, Boris. Département de Mathématiques, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Proceedings of the Royal Society of Edinburgh: Section A Mathematics, 1990, vol. 115, no. 3-4, p. 337-347. Royal Society of Edinburgh Scotland Foundation
    Other Version
    Classification
    • Health
    OAI-PMH Identifier
    • oai:doc.rero.ch:302529
    Summary
    This paper deals with the number of eigenvalues which appear in the gaps of the spectrum of a Dirac system with real and periodic coefficients when the coefficients are perturbed. The main results provide an upper bound and a condition under which exactly one eigenvalue appears in a given gap