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Two periodic solutions of second-order neutral functional differential equations |
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| Authors: | Jun Wu Zhicheng Wang |
| Affiliation: | a College of Mathematics and Computer Science, Changsha University of Science Technology, Changsha 410076, China b College of Mathematics and Econometrics, Hunan University, Changsha 410082, China |
| Abstract: | In this paper, we consider a type of second-order neutral functional differential equations. We obtain some existence results of multiplicity and nonexistence of positive periodic solutions. Our approach is based on a fixed point theorem in cones. |
| Keywords: | Fixed point theorem Positive periodic solution Multiplicity Neutral functional differential equations |
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