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Quotients by Countable Subgroups Are Hyperfinite by Frisch, Joshua; Shinko, Forte is a scholarly article available to read on EtoBox.

What is Quotients by Countable Subgroups Are Hyperfinite about?

We show that for any Polish group $G$ and any countable normal subgroup $\Gamma\triangleleft G$, the coset equivalence relation $G/\Gamma$ is a hyperfinite Borel equivalence relation. In particular, the outer automorphism group of any countable group is hyperfinite.

Author

Frisch, Joshua; Shinko, Forte

Published

2019

Language

EN