摘要
By using the continuation theorem of coincidence degree theory, the sufficient conditions to guarantee the existence of positive periodic solutions are established for nonautonomous predator-prey systems with discrete and continuously distributed delays.
By using the continuation theorem of coincidence degree theory, the sufficient conditions to guarantee the existence of positive periodic solutions are established for nonautonomous predator-prey systems with discrete and continuously distributed delays.
基金
Supported by the National Natural Science Foundation of China(No.10171044)
the Natural Science Foundation of Jiangsu Province(No.BK2001024)
the Foundation for University Key Teachers of the Ministry of Education of China
