The multiplier algebra of a nuclear quasidiagonal C*-algebra

The subject of quasidiagonality is of much interest in many places - among other things, in the classification program for simple unital separable nuclear C*-algebras. In this note, we give two characterizations of nuclearity and quasidiagonality (for simple unital separable C*-algebras). Our first characterization is the nuclear analogue of Dadarlat's characterization of exact quasidiagonal C*-algebras. Our second characterizatiion is "dual" to the interesting (and important) Popa property first studied by Popa.

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