The C*-algebras of codimension one foliations without holonomy.
The simplex of tracial quantum symmetric states
We show that the space of tracial quantum symmetric states of an arbitrary unital C*-algebra is a Choquet simplex and is a face of the tracial state space of the universal unital C*-algebra free product of A with itself infinitely many times. We also show that the extreme points of this simplex are dense, making it the Poulsen simplex when A is separable and nontrivial. In the course of the proof we characterize the centers of certain tracial amalgamated free product C*-algebras.
The State Space of the K0-group of a Simple Separable C*-algebra.
Tracial states on crossed products associated with Furstenberg transformations on the 2-torus
Travaux de Kadison sur les invariants unitaires
Un espace non Radon-Nikodým sans arbre diadique
Unique state extension and hereditary C*-subalgebras.
Заряды в непрерывных и дискретных алгебрах