In this paper,by the Avery-Henderson fixed point theorem,we investigate the existence of multiple positive periodic solutions to a class of integro-differential equation. Some suficient conditions are obtained for the existence of multiple positive periodic solutions.
Zhijian Yao(Dept. of Math. and Physics,Anhui Institute of Architecture and Industry,Hefei 230601)
In this paper, a predator-prey chain system with impulsive effects and Beddington-DeAngelis functional response is studied. We investigate the existence of periodic solu-tion by coincidence degree theory. Sufficient conditions are obtained for the existence of periodic solution.
Yao Zhijian (Dept. of Math. and Physics, Anhui Institute of Architecture and Industry, Hefei 230601)
