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SUMMARY:Federico Vigolo (University of Münster)
DTSTART:20220209T200000Z
DTEND:20220209T210000Z
DTSTAMP:20260420T052655Z
UID:NYC-NCG/85
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/NYC-NCG/85/"
 >Strong ergodicity\, projections and Markov operators</a>\nby Federico Vig
 olo (University of Münster) as part of Noncommutative geometry in NYC\n\n
 \nAbstract\nThe aim of this talk is to illustrate how some insights from t
 he theory of Markov processes can be adapted to prove that certain project
 ions belong to "Roe-like" C*-algebras of dynamical origin. Given an action
  of a countable discrete group on a measure space\, one may define a C*-al
 gebra by taking the closure of an algebra of operators with finite propaga
 tion. I will explain that this C*-algebra contains a certain natural famil
 y of rank-one projections if and only if the action is strongly ergodic. T
 his result can be used to construct more counterexamples to the coarse Bau
 m-Connes conjecture.\n
LOCATION:https://researchseminars.org/talk/NYC-NCG/85/
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