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A global condition for periodic Duffing-like equations |
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| Authors: | Piero Montecchiari Margherita Nolasco Susanna Terracini |
| Institution: | Dipartimento di Matematica, Universitá degli studi di Trieste, Piazzale Europa 1, 34013 Trieste, Italy ; S.I.S.S.A., via Beirut 4, 34013 Trieste, Italy ; Dipartimento di Matematica del Politecnico, Piazza Leonardo da Vinci 32, 20133 Milano, Italy |
| Abstract: | We study Duffing-like equations of the type  ,with  periodic. We prove that if the stable and unstable manifolds to the origin do not coincide, then the system exhibits positive topological entropy. |
| Keywords: | Duffing equations homoclinic orbits multibump solutions minimax argument |
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