Dépôt DSpace/Manakin

Parcourir Publications scientifiques par sujet "Semi-regular operators"

Parcourir Publications scientifiques par sujet "Semi-regular operators"

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  • On the generalized Kato spectrum 
    Benharrat, Mohammed; Messirdi, Bekkai (Serdica Mathematical Journal, 2011)
    We show that the symmetric difference between the generalized Kato spectrum and the essential spectrum defined in [7] by sec(T) = {l О C ; R(lI-T) is not closed } is at most countable and we also give some relationship ...
  • On the Kato, semi-regular and essentially semi-regular spectra 
    Benharrat, Mohammed; Ammar, Aymen; Jeribi, Aref; Messirdi, Bekkai (Functional Analysis, Approximation and Computation, 2015-02-16)
    In this paper, we give some properties of the semi-regular, essentially semi-regular and the operators of Kato type on a Banach space. We also show that the essentially semi-regular spectrum of closed, densely defined ...

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