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The positive periodic solution for Nicholson-type delay system with linear harvesting terms. (English) Zbl 1274.34209
Summary: This paper is concerned with a class of Nicholson-type delay system with linear harvesting terms. By applying the method of coincidence degree and Lyapunov functional, some criteria are established for the global existence and uniqueness of positive periodic solutions of the system. Moreover, an example is employed to illustrate the main results.

MSC:
34K13 Periodic solutions to functional-differential equations
92D25 Population dynamics (general)
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