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Abstract and Applied Analysis
Volume 2012 (2012), Article ID 702456, 12 pages
doi:10.1155/2012/702456
Research Article
Periodic Solutions of a Type of Liénard Higher Order Delay Functional Differential Equation with Complex Deviating Argument
School of Science, Tianjin Polytechnic University, Tianjin, Hebei 300387, China
Received 26 September 2012; Accepted 28 November 2012
Academic Editor: Jaeyoung Chung
Copyright © 2012 Haiqing Wang. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
The author has studied the existence of periodic solutions of a type of higher order delay functional differential equations with neutral type by using the theory of coincidence degree, and some new sufficient conditions for the existence of periodic solutions have been obtained.