Positive periodic solution for second-order neutral differential equation with variable delay

Zhibo Cheng, Feifan Li, shaowen Yao


In this paper, we consider the following second-order neutraldifferential equation with variable delay


where$|c|\neq1$. By applications of Krasnoselskii's fixed point theorem,some analysis skills and choosing available operators, sufficient conditions for the existence of periodic solution are established.


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