Global stability of discretized Anosov flows

TL;DR

This paper investigates the properties of discretized Anosov flows, showing their stability, coherence, and integrability, and establishing their place within the broader class of partially hyperbolic diffeomorphisms.

Contribution

It provides a comprehensive definition, proves stability and coherence properties, and explores integrability and foliation uniqueness for discretized Anosov flows.

Findings

Discretized Anosov flows form a $C^1$ open and closed set within partially hyperbolic diffeomorphisms.

All discretized Anosov flows are dynamically coherent and plaque expansive.

Unique integrability of the center bundle holds for entire connected components, including the time 1 map of an Anosov flow.

Abstract

The goal of this article is to establish several general properties of a somewhat large class of partially hyperbolic diffeomorphisms called \emph{discretized Anosov flows}. A general definition for these systems is presented and is proven to be equivalent with the definition introduced in [BFFP19], as well as with the notion of flow type partially hyperbolic diffeomorphisms introduced in [BFT20]. The set of discretized Anosov flows is shown to be $C^1$ open and closed inside the set of partially hyperbolic diffeomorphisms. Every discretized Anosov flow is proven to be dynamically coherent and plaque expansive. Unique integrability of the center bundle is shown to happen for whole connected components, notably the ones containing the time 1 map of an Anosov flow. For general connected components, a result on uniqueness of invariant foliation is obtained. Similar results are seen to happen for partially hyperbolic systems admitting a uniformly compact center foliation extending the studies initiated in [BB16].