Asymptotic evolution of smooth curves under geodesic flow on hyperbolic manifolds - II

Details Asymptotic evolution of smooth curves under geodesic flow on hyperbolic manifolds - II Asymptotic evolution of smooth curves under geodesic flow on hyperbolic manifolds - II

2008-04-23

arxiv.org/abs/0804.3749v1

Duke Math. J, Vol. 148, No. 2, 2009, pg: 281-304

Mathematics

Differential Geometry

23 pages

Scientific paper

10.1215/00127094-2009-02

Extending the earlier results for analytic curve segments, in this article we describe the asymptotic behaviour of evolution of a finite segment of a C^n-smooth curve under the geodesic flow on the unit tangent bundle of a finite volume hyperbolic n-manifold. In particular, we show that if the curve satisfies certain natural geometric conditions, the pushforward of the parameter measure on the curve under the geodesic flow converges to the normalized canonical Riemannian measure on the tangent bundle in the limit. We also study the limits of geodesic evolution of shrinking segments. We use Ratner's classification of ergodic invariant measures for unipotent flows on homogeneous spaces of SO(n,1), and an observation relating local growth properties of smooth curves and dynamics of linear SL(2,R)-actions.

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