The existence of positive periodic solutions of a class of Lotka-Volterra type impulsive systems with infinitely distributed delay

摘要

In this paper, the existence of positive periodic solutions of a class of periodic Lotka- Volterra type impulsive systems with distributed delays is studied. By using the continuation theorem of coincidence degree theory, a set of easily verifiable sufficient conditions are obtained, which improve and generalize some existing results. (c) 2005 Elsevier Ltd. All rights reserved.