Local spectrum and generalized spectrum

Mbekhta, Mostafa

doi:10.1090/S0002-9939-1991-1045142-X

Local spectrum and generalized spectrum
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by Mostafa Mbekhta

Proc. Amer. Math. Soc. 112 (1991), 457-463

DOI: https://doi.org/10.1090/S0002-9939-1991-1045142-X

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Abstract:

This paper provides the proofs of those results announced in $[5,\S 5]$ that deal with the connection between the regular set and the local resolvant set of closed operators on a Hilbert space. We also give some characterizations and properties of Cowen-Douglas operators.

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