Invertibility and Spectrum Localization
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M.I Gil'
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Article
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2002
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Elsevier Science
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English
โ 133 KB
This paper deals with Volterra perturbations of normal operators in a separable Hilbert space. Invertibility conditions and estimates for the norm of the inverse operators are established. In addition, bounds for the spectrum are suggested. Applications to integral, integro-differential, and matrix