2 papers
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.MG2017
Products of snowflaked euclidean lines are not minimal for looking down
Matthieu Joseph, Tapio Rajala
We show that products of snowflaked Euclidean lines are not minimal for looking down. This question was raised in Fractured fractals and broken dreams, Problem 11.17, by David and…