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Spectrum preserving linear mappings between Banach algebras
(Stellenbosch : Stellenbosch University, 2003-04)
ENGLISH ABSTRACT: Let A and B be unital complex Banach algebras with identities 1 and I' respectively. A linear map T : A -+ B is invertibility preserving if Tx is invertible in B for every invertible x E A. We say that ...