-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