2 papers
math.DS2025
Non-classifiability of mixing zero-entropy diffeomorphisms up to isomorphism
Marlies Gerber, Philipp Kunde
We show that the problem of classifying, up to isomorphism, the collection of zero-entropy mixing automorphisms of a standard non-atomic probability space, is intractible. More pre…
math.DS2024
Non-classifiability of Ergodic Flows up to Time Change
Marlies Gerber, Philipp Kunde
A time change of a flow , , is a reparametrization of the orbits of the flow such that each orbit is mapped to itself by an orientation-preserving homeom…