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Abstract and Applied Analysis
Volume 2013, Article ID 489804, 5 pages
Research Article

Oscillation Criteria of First Order Neutral Delay Differential Equations with Variable Coefficients

School of Mathematical Sciences, Faculty of Science and Technology, Universiti Kebangsaan, 43600 UKM Bangi, Selangor, Malaysia

Received 2 May 2013; Accepted 2 September 2013

Academic Editor: Rodrigo Lopez Pouso

Copyright © 2013 Fatima N. Ahmed et al. 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.


Some new oscillation criteria are given for first order neutral delay differential equations with variable coefficients. Our results generalize and extend some of the well-known results in the literature. Some examples are considered to illustrate the main results.