On a Theorem by Ekeland-Hofer
arXiv:1001.3386 · doi:10.1007/s11856-011-0087-4
Abstract
In [EH89, Theorem 1] Ekeland-Hofer prove that for a centrally symmetric, restricted contact type hypersurface in R^{2n} and for any global, centrally symmetric Hamiltonian perturbation there exists a leaf-wise intersection point. In this note we show that if we replace restricted contact type by star-shaped there exists infinitely many leaf-wise intersection points or a leaf-wise intersection point on a closed characteristic.
5 pages, 1 figure; v2: minor changes