Homotopical Dynamics IV: Hopf invariants and hamiltonian flows

Details Homotopical Dynamics IV: Hopf invariants and hamiltonian flows Homotopical Dynamics IV: Hopf invariants and hamiltonian flows

2001-11-22

arxiv.org/abs/math/0111247v1

Mathematics

Dynamical Systems

54 pages

Scientific paper

In a non-compact context the first natural step in the search for periodic orbits of a hamiltonian flow is to detect bounded ones. In this paper we show that, in a non-compact setting, certain algebraic topological constraints imposed to a gradient flow of the hamiltonian function $f$ imply the existence of bounded orbits for the hamiltonian flow of $f$. Once the existence of bounded orbits is established, under favorable circumstances, application of the $C^{1}$-closing lemma leads to periodic ones.

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