摘要
In this paper, we study the existence of a positive periodic solution forN′(t)=r(t)1-x(t-τ(t)K(t) θ ,and obtain sufficient conditions for the periodic solution to be globally attractive.
In this paper, we study the existence of a positive periodic solution forN′(t)=r(t)1-x(t-τ(t)K(t) θ ,and obtain sufficient conditions for the periodic solution to be globally attractive.
