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Periodic solutions for Hamiltonian systems with super-linear and sign-changing nonlinearities
Keywords:second order Hamiltonian system; sign-changing; super quadratic; periodic solutions.
Abstract:
      In this paper, we consider the existence of periodic solutions for a class of super quadratic second-order Hamiltonian system, where the primitive functions of nonlinearities may be sign-changing. By using some weaker conditions, our result extends and improves some existed results in the literature.