On the number of periodic trajectories for a Hamiltonian flow on a convex energy surface. (English) Zbl 0449.70014
MSC:
| 70H05 | Hamilton’s equations |
| 58E05 | Abstract critical point theory (Morse theory, Lyusternik-Shnirel’man theory, etc.) in infinite-dimensional spaces |
| 58E15 | Variational problems concerning extremal problems in several variables; Yang-Mills functionals |
| 34C25 | Periodic solutions to ordinary differential equations |
