Abstract
In this paper, using Fourier series, we study the problem of the existence of periodic solutions of a type of periodic neutral differential difference system. Some necessary and sufficient conditions for the existence of periodic solutions of a type of neutral functional equation system are obtained, and at the same time, we present a method with formula shows how to find the periodic solutions.
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Zhang, Y., Zhang, Y. The necessary and sufficient conditions for the existence of periodic solutions of a type of neutral functional differential equations. Acta Mathematicae Applicatae Sinica 7, 74–79 (1991). https://doi.org/10.1007/BF02080205
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DOI: https://doi.org/10.1007/BF02080205