Electronic Journal of Differential Equations,
Conference 05 (2000), pp. 237-245.

Title: On critical points for noncoercive functionals and subharmonic
  solutions of some Hamiltonian systems.

Authors: Klaus Schmitt (Univ. of Utah, Salt Lake City, UT)
  Zhi-Qiang Wang (Utah State Univ., Logan, UT)
 
Abstract: 
  The paper is concerned with existence results about subharmonic
  solutions of some Hamiltonian systems. The existence of such solutions
  is established using a variational approach and results about minima
  of noncoercive functionals.

Published October 24, 2000.
Math Subject Classifications: 35J15, 37J45, 34C15.
Key Words: Noncoercive functionals; Hamiltonian systems; subharmonic solutions.