Multiplicity of closed characteristics on symmetric convex hypersurfaces in $\R^{2n}$

Chun-gen Liu, Yiming Long, Chaofeng Zhu

Published 2001-09-23Version 1

Let $\Sigma$ be a compact $C^2$ hypersurface in $\R^{2n}$ bounding a convex set with non-empty interior. In this paper it is proved that there always exist at least $n$ geometrically distinct closed characteristics on $\Sigma$ if $\Sigma$ is symmetric with respect to the origin.