Symmetric difference between pseudo B-Fredholm spectrum and spectra originated from Fredholm theory

Abdelaziz Tajmouati, Mohamed Amouch, Mohammed Karmouni

In this paper, we continue the study of the pseudo B-Fredholm operators of Boasso, and the pseudo B-Weyl spectrum of Zariouh and Zguitti; in particular we find that the pseudo B-Weyl spectrum is empty whenever the pseudo B-Fredholm spectrum is, and look at the symmetric differences between the pseudo B-Weyl and other spectra.