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On the structure of Besse convex contact spheres

Marco MazzucchelliMarco Radeschi
arXiv: Symplectic Geometry
Dec 2020
摘要
We consider convex contact spheres $Y$ all of whose Reeb orbits are closed. Any such $Y$ admits a stratification by the periods of closed Reeb orbits. We show that $Y$ resembles a contact ellipsoid: any stratum of $Y$ is an integral homology sphere, and the sequence of Ekeland-Hofer spectral invariants of $Y$ coincides with the full sequence of action values, each one repeated according to its multiplicity.
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