Abstract
The central theme of this chapter investigates compact perturbations.We shall be particularly concerned with properties of the spectrum of an operator that are invariant under compact perturbations; that is, properties of the spectrum of T that are also possessed by the spectrum of T + K for every compact operator K.
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© 2012 Springer Science+Business Media, LLC
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Kubrusly, C.S. (2012). Fredholm Theory. In: Spectral Theory of Operators on Hilbert Spaces. Birkhäuser, Boston. https://doi.org/10.1007/978-0-8176-8328-3_5
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DOI: https://doi.org/10.1007/978-0-8176-8328-3_5
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Publisher Name: Birkhäuser, Boston
Print ISBN: 978-0-8176-8327-6
Online ISBN: 978-0-8176-8328-3
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