摘要
利用Mawhin的重合度理论,讨论了一类具有连续分布时滞的三种群捕食——食饵系统的周期正解的存在性,得到了其充分条件.
By using the theory of Mawhin coincidence degree,the existence of positive periodic solution for a class of predator-prey system with continuous-distributed delays is proved.A new result is obtained.
出处
《扬州教育学院学报》
2007年第3期7-11,共5页
Journal of Yangzhou College of Education
关键词
重合度
正周期解
FREDHOLM算子
coincidence degree
positive periodic solution
Fredholm operator