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Banach algebras with unique uniform norm |
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| Authors: | S. J. Bhatt H. V. Dedania |
| Affiliation: | Department of Mathematics, Sardar Patel University, Vallabh Vidyanagar 388 120, Gujarat, India H. V. Dedania ; Department of Mathematics, Sardar Patel University, Vallabh Vidyanagar 388 120, Gujarat, India |
| Abstract: | Commutative semisimple Banach algebras that admit exactly one uniform norm (not necessarily complete) are investigated. This unique uniform norm property is completely characterized in terms of each of spectral radius, Silov boundary, set of uniqueness, semisimple norms; and its connection with recently investigated concepts like spectral extension property, multiplicative Hahn Banach extension property and permanent radius are revealed. Several classes of Banach algebras having this property as well as those not having this property are discussed. |
| Keywords: | Unique uniform norm property semisimple norm spectral extension property spectral norm extension of Banach algebra unique semisimple norm property |
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