Rotational deviations and invariant pseudo-foliations for periodic point free torus homeomorphisms

Abstract

This article deals with directional rotational deviations for non-wandering periodic point free homeomorphisms of the 2-torus which are homotopic to the identity. We prove that under mild assumptions, such a homeomorphism exhibits uniformly bounded rotational deviations in some direction if and only it leaves invariant a pseudo-foliation, a notion which is a slight generalization of classical one-dimensional foliations. To get these results, we introduce a novel object called $\tilde\rho$-centralized skew-product and their associated stable sets at infinity.