periodicity in a delayed ratio-dependent predator-prey system with exploited term
;Li Zhai;Zhijun Zeng
icsoft 2006 - 1st international conference on software and data technologies, proceedings2007Vol. 2007pp. 1-10
123
zhai2007electronicperiodicity
Abstract
With the help of the coincidence degree and the related continuation theorem, we explore the existence of at least two periodic solutions of a delayed ratio-dependent predator-prey system with exploited term. Some easily verifiable sufficient criteria are established for the existence of at least two positive periodic solutions.