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math.DS2023
Stabilizers for ergodic actions and invariant random expansions of non-archimedean Polish groups
Colin Jahel, Matthieu Joseph
Let be a closed permutation group on a countably infinite set , which acts transitively but not highly transitively. If is oligomorphic, has no algebraicity and weakly e…
math.DS2023
Amenable wreath products with non almost finite actions of mean dimension zero
Matthieu Joseph
Almost finiteness was introduced in the seminal work of Kerr as an dynamical analogue of Z-stability in the Toms-Winter conjecture. In this article, we provide the first examples o…