n维非对称Duffing方程周期解的存在性

On the Existence of Periodic Solutions for n─Dimensional Duffing Equations

讨论了ｎ维非对称Ｄｕｆｆｉｎｇ方程周期解的存在性，利用Ｓｃｈａｕｄｅｒ不动点定理，给出了其周期解存在的四个充分条件。

Discusses the existence of periodic solutions for n─dimensional Duffing equations. Using schauder fixed point theorem, four existence theovems are proved.