Electronic Journal of Differential Equations,
Vol. 2001(2001), No. 69, pp. 1-17.

Title: Nontrivial periodic solutions of asymptotically
       linear Hamiltonian systems
   
Author: Guihua Fei (Univ. of Minnesota, Duluth, MN, USA.)
         
Abstract:  
 We study the existence of periodic solutions for some
 asymptotically linear Hamiltonian systems. By using the
 Saddle Point Theorem and Conley index theory, we obtain
 new results under asymptotically linear conditions.

Submitted September 14, 2001. Published November 19, 2001.
Math Subject Classifications: 58E05, 58F05, 34C25.
Key Words: periodic solution; Hamiltonian systems; 
           Conley index; Galerkin approximation.