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A Study of Systems of Nonlinear Delay Integral Equations by using the Method of upper and lower solutions

Abdellatif Sadrati, Abderrahim Zertiti

Abstract


In this work, we use the method of upper and lower solutions to study the existence of positive and periodic solutions of nonlinear delay integral system which, from the biological point of view, models the evolution in time of two species with a periodic interaction. Our results are generalizations of some known results. An example is given to illustrate our results.

Keywords


Nonlinear delay integral systems, positive periodic solutions.

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