多时滞Lotka-Volterra互惠系统周期正解的存在性

Existence of Positive Periodic Solution of Multidelays Facultative Mutualism System

用重合度理论研究具时滞非自治Lotka Volterra互惠系统 ,获得了周期正解的存在性 ,推广了Gopalsamy及He(1997)

With the help of continuation theorem in coincidence degree theory, we study the existence of positive periodic solutions of 2 species Lotka Volterra facultative mutualism systems with severaldelays. The existence theorem is obtained in this paper, generalized the results of Gopalsamy and He(1997).