On the dominated splitting of Lyapunov stable aperiodic classes
Abstract
Recent works related to Palis conjecture of J. Yang, S. Crovisier, M. Sambarino and D. Yang showed that any aperiodic class of a C1-generic diffeomorphism far away from homoclinic bifurcations (or homoclinic tangencies) is partially hyperbolic. We show in this paper that, generically, a non-trivial dominated splitting implies partial hyperbolicity for an aperiodic class if it is Lyapunov stable. More precisely, for C1-generic diffeomorphisms, if a Lyapunov stable aperiodic class has a non-trivial dominated splitting E F, then one of the two bundles is hyperbolic (either E is contracted or F is expanded).
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