Abstract
In this paper we get an existence theorem of nontrivial critical points by using the local linking idea. As applications, we study the existence of nontrivial periodic solution of Hamiltonian systems.
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Shujie, L., Jiaquan, L. Infinite dimensional local linking and some applications to the Hamiltonian systems. Acta Mathematica Sinica 5, 365–382 (1989). https://doi.org/10.1007/BF02107714
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DOI: https://doi.org/10.1007/BF02107714