4 citations · 5 across the 4 of their papers we have counts for
4 papers
Spectra Originated from Fredholm Theory and Browder's Theorem
Mohamed Amouch, Mohamed Karmouni, Abdelaziz Tajmouati
We give a new characterization of Browders theorem through equality between the pseudo B-Weyl spectrum and the generalized Drazin spectrum. Also, we will give conditions under whic…
Spectral inclusion for -Semigroups Drazin invertible and Quasi-Fredholm operators
A. Tajmouati, M. Amouch, M. R. F. Z. Alhomidi
Let be a semigroups and be its infinitesimal generator. In this work, we prove that the spectral inclusion for remains true for the Dr…
Pseudo B-Fredholm Operators and Spectral Theory
Abdelaziz Tajmouati, Mohamed Amouch, Mohamed Karmouni
In this paper, we show that every pseudo B-Fredholm operator is a pseudo Fredholm operator. Afterwards, we prove that the pseudo B-Weyl spectrum is empty if and only if the pseudo…
Spectral equality for semigroups
A. Tajmouati, M. Amouch, M. R. F. Alhomidi Zakariya
In this paper, we give conditions for which the semigroups satisfies spectral equality for semiregular, essentially semiregular and semi-Fredholm spectrum. Also, we establish…