Supported by the National Natural Science Foundation of China (No.19531070)
In this paper, we study a non-autonomous ratio-dependent predator-prey model with exploited term. By means of the coincidence degree theory, we establish a sufficient condition for the existence of at least two positi...
Research supported by National Natural Science Foundation of China(No.19531070);the Youth Project Foundation of Hubei Province Education Department(No.2002B00002)
In this paper, a three species difFusive predator-prey modei with functional response and periodic stocking is studied, where all parameters are time depen-dent. By using new theorem of coincidence degree theory, the ...