Essential Spectra on Spaces with the Dun
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Khalid Latrach
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Article
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1999
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Elsevier Science
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English
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The purpose of this paper is to investigate the invariance, under weakly compact perturbations, of various essential spectrums of closed, densely defined linear operators acting on Banach spaces which possess the Dunford-Pettis property. Both bounded and unbounded perturbations are considered.