GONZALO CONTRERAS, RENATO ITURRIAGA,
GABRIEL P. PATERNAIN, AND MIGUEL PATERNAIN
Abstract. Let L be a convex superlinear autonomous Lagrangian on a close*
*d con-
nected manifold N. We consider critical values of Lagrangians as defined*
* by R. Ma"n'e
in [22]. We define energy levels satisfying the Palais-Smale condition a*