Tracial positive linear maps of 𝐶*-algebras

Choi, Man Duen; Tsui, Sze Kai

doi:10.1090/S0002-9939-1983-0677231-9

Tracial positive linear maps of $C\sp{\ast}$ -algebras

Authors: Man Duen Choi and Sze Kai Tsui
Journal: Proc. Amer. Math. Soc. 87 (1983), 57-61
MSC: Primary 46L05
DOI: https://doi.org/10.1090/S0002-9939-1983-0677231-9
MathSciNet review: 677231
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Abstract: A positive linear map $\Phi :\mathfrak{A} \to \mathfrak{B}$ between two ${C^ * }$ -algebras is said to be tracial if $\Phi ({A_1}{A_2}) = \Phi ({A_2}{A_1})$ for all ${A_i} \in \mathfrak{A}$ . A tracial positive linear map $\mathfrak{A} \to \mathcal{B}\left(\mathcal{H} \right)$ is analyzed as the composition of a tracial positive linear map $\mathfrak{A} \to C(X)$ followed by a positive linear map $C(X) \to \mathcal{B}\left( \mathcal{H} \right)$ .

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