Positive Periodic Solutions of Nonautonomous Competitive Systems with Distributed Delay and Weak Allee Effect

摘要

In this paper,we study nonautonomous Lotka-Volterra type multispecies competitive systems with distributed delay and weak Allce effect.By using the continuation theorem of coincidence degree theory,an existence theorem of positive periodic solutions is established.And for a special case,we obtian the global attractivity for the system.