4 citations · 4 across the 7 of their papers we have counts for
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Semi-Fredholm and Semi-Browder Spectra For -Quasi-Semigroups
Abdelaziz Tajmouati, Youness Zahouan
In this paper, we describe the different spectra of the -quasi-semigroups by the spectra of their generators. Specially, essential ascent and descent,Drazin invertible, upper…
Spectral Inclusions Between C0-Quasi-Semigroups and Their Generators
Abdelaziz Tajmouati, Youness Zahouan, Mohamed Ahmed Ould Mohamed Baba
In this paper, we show a spectral inclusion of a different spectra of a C0-quasi-semigroup and its generator and precisely for ordinary, point, approximate point, residual, essenti…
Cesàro-Hypercyclic and Weyl type theorem
Abdelaziz Tajmouati, Mohammed El Berrag
In this paper we study the relations between Cesàro-hypercyclic operators and the operators for which Weyl type theorem holds.
Spectral mapping theorems of differentiable C0 semigroups
Abdelaziz Tajmouati, Hamid Boua, Mohammed Karmouni
Let be a semigroup on a Banach space with infinitesimal generator . In this work, we give conditions for which the spectral mapping theorem $σ_{*}(T…
Riesz Decomposition Relative to C*-Algebra Homomorphisms
Abdelaziz Tajmouati, Abdeslam El Bakkali, Safae Alaoui Chrifi
The aim of the present work is to study the Riesz decomposition relative to a C*-algebra homomorphism T : A --> B. We prove that under some conditions on T, T-Riesz elements can be…
Quasi-fredholm and saphar spectrums for the α-times integrated semigroups
Abdelaziz Tajmouati, Abdeslam El Bakkali, Mohamed Ahmed Mohamed Baba +1
We continue to study -times integrated semigroups. Essentially, we characterize the different spectrums of -times integrated semigroups by the spectrums of their generators.…