The spectrum of the discrete Cesàro operator

2010 Mathematics Subject Classification: 47A10. We show that the symmetric difference between the generalized Kato spectrum and the essential spectrum defined in [7] by sec(T) = {l О C ; R(lI-T) is not closed } is at most countable and we also give some relationship between this spectrum and the SVEP theory.

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Vladimír Müller, Andrzej Sołtysiak (1988)

Commentationes Mathematicae Universitatis Carolinae

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Altay, Bilâl, Başar, Feyzi (2005)

International Journal of Mathematics and Mathematical Sciences

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