Abstract
In the present chapter we consider the invertibility and spectrum of matrices, whose entries are unbounded, in general, operators. In particular, under some restrictions, we improve the Gershgorin-type bounds. Applications to matrix differential operators are also discussed.
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© 2003 Springer-Verlag Berlin Heidelberg
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Gil’, M.I. (2003). 15 Operator Matrices. In: Operator Functions and Localization of Spectra. Lecture Notes in Mathematics, vol 1830. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45225-6_15
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DOI: https://doi.org/10.1007/978-3-540-45225-6_15
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Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-20246-2
Online ISBN: 978-3-540-45225-6
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