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math.SP2018
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…
math.SP2018
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…