Journal
JOURNAL OF DIFFERENTIAL EQUATIONS
Volume 369, Issue -, Pages 229-252Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jde.2023.06.001
Keywords
Hamiltonian systems; Rotating periodic solutions; Morse theory
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In this paper, the rotating periodic solutions of a Hamiltonian system with a twist condition are considered. The system has a form x(t + T) = Qx(t), where x∈R2N and Q is a symplectic orthogonal matrix. The existence and multiplicity of nontrivial rotating periodic solutions are established by combining a finite dimensional reduction method, Morse theory, and minimax principle.
In this paper, we consider rotating periodic solutions of the Hamiltonian system x = JH'(t, x), x & ISIN; R2N, having the form x(t + T ) = Qx(t), & FORALL;t & ISIN; R, for some T > 0 and a symplectic orthogonal matrix Q. We study the system under a general twist condition: the nonlinear term H'(t, x) is required to be of linear growth but not necessarily to be asymptotically linear at infinity. The twist is reflected in the difference of the generalized Morse index at the origin and at infinity. By combining a finite dimensional reduction method, Morse theory and minimax principle, we establish the existence and multiplicity of nontrivial rotating periodic solutions.& COPY; 2023 Elsevier Inc. All rights reserved.
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