Concerning spectral characterizations of the radical in Banach algebras
Commentationes Mathematicae Universitatis Carolinae, Tome 17 (1976) no. 4, pp. 689-691.

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Classification : 46H05
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     title = {Concerning spectral characterizations of the radical in {Banach} algebras},
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     zbl = {0337.46043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1976__17_4_a6/}
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Zemánek, Jaroslav. Concerning spectral characterizations of the radical in Banach algebras. Commentationes Mathematicae Universitatis Carolinae, Tome 17 (1976) no. 4, pp. 689-691. http://geodesic.mathdoc.fr/item/CMUC_1976__17_4_a6/