Displaying similar documents to “Spectral properties of a certain class of Carleman operators”

On the localization of the spectrum for quasi-selfadjoint extensions of a Carleman operator

S. M. Bahri (2012)

Mathematica Bohemica

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In the present work, using a formula describing all scalar spectral functions of a Carleman operator A of defect indices ( 1 , 1 ) in the Hilbert space L 2 ( X , μ ) that we obtained in a previous paper, we derive certain results concerning the localization of the spectrum of quasi-selfadjoint extensions of the operator A .

On unbounded hyponormal operators III

J. Janas (1994)

Studia Mathematica

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The paper deals mostly with spectral properties of unbounded hyponormal operators. Some nontrivial examples of such operators are given.