Generalized Browder's and Weyl's Theorems for Banach space operators

Details Generalized Browder's and Weyl's Theorems for Banach space operators Generalized Browder's and Weyl's Theorems for Banach space operators

2006-10-28

arxiv.org/abs/math/0610885v1

J. Math. Anal. Appl. 336(2007), 1424-1442.

Mathematics

Functional Analysis

Scientific paper

We find necessary and sufficient conditions for a Banach space operator T to satisfy the generalized Browder's theorem, and we obtain new necessary and sufficient conditions to guarantee that the spectral mapping theorem holds for the B-Weyl spectrum and for polynomials in T. We also prove that the spectral mapping theorem holds for the B-Browder spectrum and for analytic functions on an open neighborhood of \sigma(T). As applications, we show that if T is algebraically M-hyponormal, or if T is algebraically paranormal, then the generalized Weyl's theorem holds for f(T), where f \in H(T), the space of functions analytic on an open neighborhood of \sigma(T). We also show that if T is reduced by each of its eigenspaces, then the generalized Browder's theorem holds for f(T), for each f \in H(\sigma(T)).

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