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Additive maps preserving the minimum and surjectivity moduli of operators |
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| Authors: | Mohamed Bendaoud |
| Affiliation: | (1) Département de mathématiques, Faculté des Sciences, University Moulay Ismail, Meknès, Maroc |
| Abstract: | Let  be a complex Hilbert space and let  be the algebra of all bounded linear operators on  . We characterize additive maps from  onto itself preserving different spectral quantities such as the minimum modulus, the surjectivity modulus, and the maximum modulus of operators. Received: 15 July 2008 |
| Keywords: | KeywordHeading" >Mathematics Subject Classification (2000). Primary 47B48 Secondary 47A10, 46A05 |
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