A Necessary and Sufficient Condition for a Self-Diffeomorphism of a Smooth Manifold to be the Time-1 Map of the Flow of a Differential Equation

Jeffrey J. Rolland

Published 2021-10-25, updated 2022-04-08Version 4

In topological dynamics, one considers a topological space $X$ and a self-map $f: X \to X$ of $X$ and studies the self-map's properties. In global analysis, one considers a smooth manifold $M^n$ and a differential equation $\xi: M \to TM$ on $M$ and studies the flow $\Phi_t: M \times \mathbb{R} \to M$ of the differential equation. In this paper, we consider a necessary and sufficient condition for a self-diffeomorphism $f$ of a manifold $M$ to be the time-1 map $\Phi_1$ of the flow of a differential equation on $M$.