The isomorphism problem for group actions
Dynamical Systems
2025-07-10 v1 Logic
Abstract
We discuss the isomorphism problem for ergodic actions of locally compact groups. In particular we show that the conjugacy relation is not Borel for ergodic measure preserving actions of indicable groups.
Keywords
Cite
@article{arxiv.2507.06257,
title = {The isomorphism problem for group actions},
author = {Matthew Foreman and Benjamin Weiss},
journal= {arXiv preprint arXiv:2507.06257},
year = {2025}
}