Borel asymptotic dimension for boundary actions of hyperbolic groups
Petr Naryshkin (WWU Münster)
Thursday, May 11, 2023, 11:10 – 12:00, -101
We show that the orbit equivalence relation of an action of a hyperbolic group on its Gromov boundary has finite Borel asymptotic dimension. As a corollary, that recovers the theorem of Marquis and Sabok which states that this orbit equivalence relation is hyperfinite.