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math.DS2013
Orbit equivalence and Borel reducibility rigidity for profinite actions with spectral gap
Adrian Ioana
We study equivalence relations that arise from left translation actions of countable groups on their profinite completions. Under the assumption t…
math.OA2013★ 29 cited
W*-superrigidity for arbitrary actions of central quotients of braid groups
Ionut Chifan, Adrian Ioana, Yoshikata Kida
For any let be the quotient of the braid group through its center. We prove that any free ergodic probability measure preserving (pmp)…