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On generalized property (v) for bounded linear operators

J. SanabriaC. CarpinteroE. RosasO. García — 2012

Studia Mathematica

An operator T acting on a Banach space X has property (gw) if σ a ( T ) σ S B F ¯ ( T ) = E ( T ) , where σ a ( T ) is the approximate point spectrum of T, σ S B F ¯ ( T ) is the upper semi-B-Weyl spectrum of T and E(T) is the set of all isolated eigenvalues of T. We introduce and study two new spectral properties (v) and (gv) in connection with Weyl type theorems. Among other results, we show that T satisfies (gv) if and only if T satisfies (gw) and σ ( T ) = σ a ( T ) .

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