Periodic solution of a delayed predator-prey system without dominating instantaneous negative feedback

摘要

By using the continuation theorem base on Gaines and Mawhin's coincidence degree, sufficient and realistic conditions are obtained for the global existence of positive periodic solution for a delayed predator-prey system without dominating instantaneous negative feedback. Indeed, our result are applicable to statedependent delays. (C) 2003 Elsevier Inc. All rights reserved.