%0 Journal Article
%A ZHANG Huan-Huan
%T Multiplicity of Periodic Solution of a Class of Non-Automous Second Order System at Resonance
%D 2015
%R 10.3969/j.cnki.jdxb.2015.05.004
%J Journal of Jishou University(Natural Sciences Edition)
%P 16-20
%V 36
%N 5
%X The existence of periodic solutions for non-automous second order systems at resonance is investigated.With the sub-linear increase of the non-linear term,the periodic solutions of the system are converted into the critical points of a functional defined on a proper spaceļ¼and the existence of periodic solutions is proved through the critical point theory.
%U https://zkxb.jsu.edu.cn/EN/10.3969/j.cnki.jdxb.2015.05.004