Consider the geodesic flow on a real-analytic closed hypersurface $ M $ of $ \mathbb{R}^n $, equipped with the induced metric. How commonly can we expect such flows to have a transverse homoclinic orbit? In this paper, we give the following two partial answers to this question:
● If $ M $ is a real-analytic closed hypersurface in $ \mathbb{R}^n $ (with $ n \geq 3 $) on which the geodesic flow with respect to the induced metric has a nonhyperbolic periodic orbit, then $ C^{\omega} $-generically the geodesic flow on $ M $ with respect to the induced metric has a hyperbolic periodic orbit with a transverse homoclinic orbit; and
● There is a $ C^{\omega} $-open and dense set of real-analytic, closed, and strictly convex surfaces $ M $ in $ \mathbb{R}^3 $ on which the geodesic flow with respect to the induced metric has a hyperbolic periodic orbit with a transverse homoclinic orbit.
These are among the first perturbation-theoretic results for real-analytic geodesic flows.
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