Mathematics – Operator Algebras
Scientific paper
2005-09-29
Duke Mathematical Journal, Vol. 140, 2007, p. 35--84.
Mathematics
Operator Algebras
Correction in postal adress
Scientific paper
We study the C*-algebras and von Neumann algebras associated with the universal discrete quantum groups. They give rise to full prime factors and simple exact C*-algebras. The main tool in our work is the study of an amenable boundary action, yielding the Akemann-Ostrand property. Finally, this boundary can be identified with the Martin or the Poisson boundary of a quantum random walk.
Vaes Stefaan
Vergnioux Roland
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