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Sponsored by the Center for Science and Technology Development of the Ministry of Education
Supervised by Ministry of Education of the People's Republic of China
We use constrained variational minimizing methods to study the existence of
periodic solutions with a prescribed energy for a class of second order Hamiltonian
systems with C^2 potential V function which has an unbounded upper level
set, our result can be regarded as a complementary of the well-known Theorem
of Benci-Gluck-Ziller and Hayashi.
Keywords:C^2 second order Hamiltonian systems;periodic solutions;constrained variational minimizing methods