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  • Periodic orbits of a generalized Hénon–Heiles system 

    Álvarez-Ramírez, M.; García-Saldaña, J. D. (2020-02)
    In this paper, we apply the Lyapunov center theorem, Weinstein–Moser theorem and the averaging theory of second order to prove the existence of periodic orbits of a one-parameter generalized Hénon–Heiles Hamiltonian system ...