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- W2945599585 abstract "We study contractive projections, isometries, and real positive maps on algebras of operators on a Hilbert space. For example we find generalizations and variants of certain classical results on contractive projections on C*-algebras and JB-algebras due to Choi, Effros, Stormer, Friedman and Russo, and others. In fact most of our arguments generalize to contractive `real positive' projections on Jordan operator algebras, that is on a norm-closed space A of operators on a Hilbert space which are closedunder the Jordan product. We also prove many new general results on real positive maps which are foundational to the study of such maps, and of interest in their own right. We also prove a new Banach-Stone type theorem for isometries between operator algebras or Jordan operator algebras. An application of this is given to the characterization of symmetric real positive projections." @default.
- W2945599585 created "2019-05-29" @default.
- W2945599585 creator A5015708217 @default.
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- W2945599585 date "2019-05-14" @default.
- W2945599585 modified "2023-09-27" @default.
- W2945599585 title "Contractive projections and real positive maps on operator algebras" @default.
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