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Oscillation and Nonoscillation of a Nonautonomous Discrete Food-limited with Impulses

Zhang Zhihong (Mathematics Department of Yueyang Teacher's College,Yueyang?414000,China)  
In this paper we consider the nonautonomous discrete food limited model with impulses Δ x(n)+∑m i=1 r i(n)x(n-l i)x(n-l i)+11+λ[x(n-l i)+1]=0, n≥0,n≠n k; x(n k+1)-x(n k)=b kx(n k), k=1,2,...sufficient conditions are obtained for the oscillation and nonoscillation of solutions of equations.
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