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- W4362679369 abstract "We consider inductive systems of C*-algebras with completely positive contractive connecting maps. We define a condition, called C*-encoding, which is sufficient for the limit of the system to be completely order isomorphic to a C*-algebra and hence guarantees a unique C*-algebra associated to the limit. When the system consists of finite-dimensional C*-algebras, this condition is also necessary and thus characterizes when the limit is completely order isomorphic to a (nuclear) C*-algebra. C*-encoding systems generalize the NF systems of Blackadar and Kirchberg and the CPC*-systems of the author and Winter. Moreover, any system of completely positive approximations of a nuclear C*-algebra gives rise to a C*-encoding system. Consequently a separable C*-algebra is nuclear if and only if it is completely order isomorphic to the limit of a C*-encoding system. This gives an inductive limit description of all separable nuclear C*-algebras equivalent to the recent construction of the author and Winter but without the additional structure of order zero maps. Without these extra structural requirements, one can easily construct examples of our systems, which we demonstrate for all amenable group C*-algebras." @default.
- W4362679369 created "2023-04-07" @default.
- W4362679369 creator A5045415245 @default.
- W4362679369 date "2023-04-05" @default.
- W4362679369 modified "2023-10-17" @default.
- W4362679369 title "Completely positive approximations and inductive systems" @default.
- W4362679369 doi "https://doi.org/10.48550/arxiv.2304.02325" @default.
- W4362679369 hasPublicationYear "2023" @default.
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