2008/06/10 by Leonel Robert, Robert, Leonel
Mathematics · #Advanced Operator Algebra Research
paper · pdf · doi:10.48550/arxiv.0806.1570
It is shown in this paper that two positive elements of a C*-algebra agree on all lower semicontinuous traces if and only if they are equivalent in the sense of Cuntz and Pedersen. A similar result is also obtained in the more general case where the two elements are comparable by their values on the lower semicontinuous traces. This result is used to give a characterization of the functions on the cone of lower semicontinuous traces of a stable C*-algebra that arise from positive elements of the algebra.