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SOME SOLUTIONS OF THE FINITE SPECTRUM PROBLEM AND APPLICATIONS
SOFIANE MESSIRDI,MOHAND OULD ALI,BEKKAI MESSIRDI 장전수학회 2018 Advanced Studies in Contemporary Mathematics Vol.28 No.3
In this paper, we characterize linear operators with fi nite spectrum in the Banach spaces setting via quasi-Fredholm and pseudo-Fredholm spectrums. As applications, we find sufficient conditions under which the spectrum of operator matrices and that of totally paranormal operators is finite.