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The Brauer–Ostrowski Theorem for Matrices of Operators

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Abstract.

The classical Brauer-Ostrowski Theorem gives a localization of the spectrum of a matrix by a union of Cassini ovals. In this paper we prove a corresponding result for operator matrices.

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  1. Institut für Analysis, Universität Karlsruhe, D-76128, Karlsruhe, Germany

    Gerd Herzog & Christoph Schmoeger

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  1. Gerd Herzog
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  2. Christoph Schmoeger
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Correspondence to Gerd Herzog.

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Herzog, G., Schmoeger, C. The Brauer–Ostrowski Theorem for Matrices of Operators. Integr. equ. oper. theory 57, 513–520 (2007). https://doi.org/10.1007/s00020-006-1472-y

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  • DOI: https://doi.org/10.1007/s00020-006-1472-y

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