paper

-semigroups: around and beyond Arveson's work

arXiv:1209.5838

Abstract

We give an account of the theory of -semigroups. We first focus on Arveson's contributions to the field and related results. Then we present the recent development of type II and type III -semigroups. We also include a short note in Appendix, based on Arveson's observation, on noncommutative Poisson boundaries.

26 pages

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