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数学物理学报(A辑) 2005
Monotone Method for First Order Periodic Boundary Value Problems of Delay Difference Equations
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Abstract:
In this paper, the upper and lower solutions combining with the monotone itera- tive technique is emploied to study the existence of solutions for first order periodic bound- ary value problems of delay difference equations. Assuming that the upper and lower solu- tions exist, two group of sufficient conditions are obtained to guarantee the existence of extreme solutions of the boundary value problem.