An analytic approach to the spectral characterization of the radical
Graham R. Allan
Studia Mathematica, Tome 187 (2008), p. 11-14 / Harvested from The Polish Digital Mathematics Library
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We give a simple complex-variable proof of an old result of Zemánek and Le Page on the radical of a Banach algebra. Incidentally, the argument also proves a recent result of Harris and Kadison.

Publié le : 2008-01-01
EUDML-ID : urn:eudml:doc:285245 
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Graham R. Allan. An analytic approach to the spectral characterization of the radical. Studia Mathematica, Tome 187 (2008) pp. 11-14. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm186-1-2/