Pure state extensions of the trace on the Choi algebra

Pure state extensions of the trace on the Choi algebra
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Proc. Amer. Math. Soc. 102 (1988), 957-964

DOI: https://doi.org/10.1090/S0002-9939-1988-0934874-7

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Pure state extensions of a nonhyperfinite ${\text {I}}{{\text {I}}_1}$-factor state on the Choi algebra to the Cuntz algebra ${O_2}$ is constructed.

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