Comparison of joint spectra for certain classes of commuting operators
Alan McIntosh, Alan Pryde, Werner Ricker (1988)
Studia Mathematica
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Alan McIntosh, Alan Pryde, Werner Ricker (1988)
Studia Mathematica
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Laura Burlando (1994)
Banach Center Publications
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This survey deals with necessary and/or sufficient conditions for continuity of the spectrum and spectral radius functions at a point of a Banach algebra.
Laura Burlando (1988)
Annales de la Faculté des sciences de Toulouse : Mathématiques
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V. Kordula, V. Müller (1996)
Studia Mathematica
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There are a number of spectra studied in the literature which do not fit into the axiomatic theory of Żelazko. This paper is an attempt to give an axiomatic theory for these spectra, which, apart from the usual types of spectra, like one-sided, approximate point or essential spectra, include also the local spectra, the Browder spectrum and various versions of the Apostol spectrum (studied under various names, e.g. regular, semiregular or essentially semiregular).
Elbjaoui, H., Zerouali, E. H. (2003)
International Journal of Mathematics and Mathematical Sciences
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W. Żelazko, Z. Słodkowski (1974)
Studia Mathematica
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Takashi Ichinose (1982)
Banach Center Publications
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Ragimov, Misir B. (2003)
Bulletin of the Malaysian Mathematical Sciences Society. Second Series
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Akkouchi, M. (2008)
Analele Ştiinţifice ale Universităţii “Ovidius" Constanţa. Seria: Matematică
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