Centralizers of hyperbolic and kinematic-expansive flows
Centralizers of hyperbolic and kinematic-expansive flows
We show that generic C ∞ hyperbolic flows commute with no C ∞ -diffeomorphism other than a time-t map of the flow itself. Kinematic-expansivity, a substantial weakening of expansivity, implies that C 0 flows have quasidiscrete C 0 -centralizer, and additional conditions broader than transitivity then give discrete C 0 …