TY - JOUR A2 - Peng, Mingshu AU - Zhang, Qiongfen AU - Tang, X. H. AU - Zhang, Qi-Ming PY - 2011 DA - 2011/08/03 TI - Existence of Periodic Solutions for a Class of Discrete Hamiltonian Systems SP - 463480 VL - 2011 AB - By applying minimax methods in critical point theory, we provethe existence of periodic solutions for the following discrete Hamiltonian systemsΔ2u(t-1)+F(t,u(t))=0, where t, uN, F:×N, F(t,x) is continuously differentiable in x for every t and is T-periodic in t;T is a positive integer. SN - 1026-0226 UR - https://doi.org/10.1155/2011/463480 DO - 10.1155/2011/463480 JF - Discrete Dynamics in Nature and Society PB - Hindawi Publishing Corporation KW - ER -