Lyapunov exponents of partially hyperbolic volume-preserving maps with 2-dimensional center bundle
arXiv:1604.05987 · doi:10.1016/j.anihpc.2018.01.007
Abstract
We consider the set of partially hyperbolic symplectic diffeomorphisms which are accessible, have 2-dimensional center bundle and satisfy some pinching and bunching conditions. In this set, we prove that the non-uniformly hyperbolic maps are open and there exists a open and dense subset of continuity points for the center Lyapunov exponents. We also generalize these results to volume-preserving systems.
Final version. Published online on Annales de l'Institut Henri Poincaré, Analyse non linéaire