摘要
We discuss two types of second-order neutral functional differential equations with mixed delay in this paper. By applying Krasnoselskii’s fixed-point theorem, some results about the existence of positive periodic solution to the systems are obtained, which complement the previous known results.
We discuss two types of second-order neutral functional differential equations with mixed delay in this paper. By applying Krasnoselskii’s fixed-point theorem, some results about the existence of positive periodic solution to the systems are obtained, which complement the previous known results.
基金
sponsored by the National Natural Science Foundation of China (10771001)
the NSF of Education Bureau of Anhui Province (KJ2009A005Z
KJ2010ZD02
2010SQRL159)
the NSF of Anhui Province (090416237)