PERIODIC ORBITS IN PERTURBED GENERALIZED HAMILTONIAN SYSTEMS
Zhao Xiaohua1, Li Jibin2, Huang Kelei3
1. Dept. of Math. of Yunnan Unly. & Iust. of Appl. Math. of Yunnan Province, Yunnan 650091, China; 2. Institute of Appl. Math. of Yunnan Province, Yunnan 650091, China; 3. Beijing University of Aero. & Astro., Beijing 100083, China