Exceptional sets for geodesic flows of noncompact manifolds

Abstract

For a geodesic flow on a negatively curved Riemannian manifold $M$ and some subset $A\subset T^{1}M$, we study the limit $A$-exceptional set, that is the set of points whose $\omega$-limit do not intersect $A$. We show that if the topological $\ast$-entropy of $A$ is smaller than the topological entropy of the geodesic flow, then the limit $A$-exceptional set has full topological entropy. Some consequences are stated for limit exceptional sets of invariant compact subsets and proper submanifolds.

25 pages, 2 figures