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Spectral isometries on non-simple C*-algebras
Published 31 Oct 2011 in math.FA and math.OA | (1110.6856v1)
Abstract: We prove that unital surjective spectral isometries on certain non-simple unital C*-algebras are Jordan isomorphisms. Along the way, we establish several general facts in the setting of semisimple Banach algebras.
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