Closed characteristics on compact convex hypersurfaces in ${\mathbb{R}}^{2n}$

Yiming Long, Chaofeng Zhu

For any given compact C^2 hypersurface Σin {\bf R}^{2n} bounding a strictly convex set with nonempty interior, in this paper an invariant \varrho_n(Σ) is defined and satisfies \var…