Geodesic
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 
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/
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     title = {Concerning spectral characterizations of the radical in {Banach} algebras},
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     volume = {17},
     number = {4},
     mrnumber = {0428040},
     zbl = {0337.46043},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1976_17_4_a6/}
}
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[1] Z. SŁODKOWSKI W. WOJTYŃSKI J. ZEMÁNEK: A note on quasinilpotent elements of a Banach algebra. Bull. Acad. Polon. Sci., Sér. Sci. Math. Astronom. Phys., to appear.

[2] J. ZEMÁNEK: A note on the radical of a Banach algebra. to appear. | MR