98-591 A. Delshams, R. de la Llave, T. M. Seara
A geometric approach to the existence of orbits with unbounded energy in generic periodic perturbations by a potential of generic geodesic flows of ${\bf T} ^{2}$ (263K, latex) Sep 8, 98
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Abstract. We give a proof based in geometric perturbation theory of a result proved by J.N.~Mather using variational methods. Namely, the existence of orbits with unbounded energy in perturbations of a generic geodesic flows in ${\bf T}^2$ by a generic periodic potential.

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