摘要
本文研究Ｄｕｆｆｉｎｇ型系统当Ａ是一般矩阵或反对称矩阵时２π－周期解的存在性．
s A is a general matrix of a anti-symmetric matrix,the existence of Zπ - periodic solutions for the following Duffing's take equation is considered. The coercivity conditions about G(t,x) are used here and a previous result given by Mawhin and Willem is improved.
出处
《青岛大学学报（自然科学版）》
CAS
1994年第3期19-26,共8页
Journal of Qingdao University(Natural Science Edition)
关键词
周期解
叠合度
临界点
杜分系统
Duffing's system periodic solutions coincidence degree critical points
