Jeribi essential spectrum

Chafika Belabbaci

Abstract


The aim of this paper is to present some results concerning
the Jeribi essential spectrum. We use the notion of measure of weak
noncompactness to give a formulae for the Jeribi essential spectral radius and we use the class of tauberian and cotauberian operators to present some relationship between the Jeribi essential spectrum and the other essential spectra.

Keywords


Measure of weak noncompactness; Tauberian operators; essential spectra; Fredholm operators

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DOI: http://dx.doi.org/10.14510%2Flm-ns.v0i0.1362