Mathematics – Differential Geometry
Scientific paper
2010-03-18
Mathematics
Differential Geometry
59 pages, 1 figure, to appear in Journal of Functional Analysis (JFA) and this is the final version
Scientific paper
In the recent paper \cite{LoD1}, we classified closed geodesics on Finsler manifolds into rational and irrational two families, and gave a complete understanding on the index growth properties of iterates of rational closed geodesics. This study yields that a rational closed geodesic can not be the only closed geodesic on every irreversible or reversible (including Riemannian) Finsler sphere, and that there exist at least two distinct closed geodesics on every compact simply connected irreversible or reversible (including Riemannian) Finsler 3-dimensional manifold. In this paper, we study the index growth properties of irrational closed geodesics on Finsler manifolds. This study allows us to extend results in \cite{LoD1} on rational and in \cite{DuL1}, \cite{Rad4} and \cite{Rad5} on completely non-degenerate closed geodesics on spheres and $\CP^2$ to every compact simply connected Finsler manifold. Then we prove the existence of at least two distinct closed geodesics on every compact simply connected irreversible or reversible (including Riemannian) Finsler 4-dimensional manifold.
Duan Huagui
Long Yiming
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