摘要
In this paper, by the critical point theory, a sufficient condition for the existence of multiple periodic solutions to a nonlinear second order difference system is obtained. An illustrative example is given. Our results improve and generalize some known ones.
In this paper, by the critical point theory, a sufficient condition for the existence of multiple periodic solutions to a nonlinear second order difference system is obtained. An illustrative example is given. Our results improve and generalize some known ones.
基金
supported by the Natural Science Foundation of Guangxi (No.0991279)
the Foundation of Education Department of Guangxi Province (No.200911LX427)