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math.DS2021
Another invariant for AT actions
David Handelman
We construct a collection of numerical invariants for approximately transitive (AT) actions (of ). We use them (sometimes supplemented by other invariants to show that members…
math.FA2021
Boundary of the boundary for random walks on groups
David Handelman
We study fine structure related to finitely supported random walks on infinite finitely generated discrete groups, largely motivated by dimension group techniques. The unfaithful e…