摘要
利用Mawhin重合度理论研究了一类具有偏差变元的Volterra型系统周期正解的存在性问题 ,得到了一个新的存在性定理 .
By using Mawhin coincidence degree, we study the global existence of positive periodic solutions for a class of Volterra-type systems with deviating arguments is studied and a new existence theorem is obtained.
出处
《昆明理工大学学报（理工版）》
2002年第1期133-136,共4页
Journal of Kunming University of Science and Technology(Natural Science Edition)
关键词
Volterra型系统
周期正解
存在性
重合度
Volterra-type system
positive periodic solution
existence
coincidence degree.
