Operators and Matrices · Volume 8, Issue 1 Essential spectra of some matrix operators by means of measures of weak noncompactness 08-11 Pages 205-216 DOI 10.7153/oam-08-11 Downloads Short PDF Full PDF PNG Authors Boulbeba Abdelmoumen Keywords measures of weak noncompactness in Banach spaces Fredholm operators essential spectra Subject classes 28A78 47A10 47A53 47A55 47N20