Positive periodic solutions of functional differential equations with impulses and a parameter

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Abstract

By applying the well-known Leggett–Williams multiple fixed point theorem, this paper investigates the existence of multiple positive periodic solutions of functional differential equations with impulses and a parameter.

Keywords

Functional differential equation
Impulses
Periodic solution
Leggett–Williams fixed point
Cone

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This work is supported by the National Natural Sciences Foundation of People’s Republic of China and the Natural Sciences Foundation of Yunnan Province.