Electronic Journal of Differential Equations,
Vol. 2009(2009), No. 145, pp. 1-8.

Title: Oscillatory behavior of second-order neutral difference 
       equations with positive and negative coefficients

Authors: Ethiraju Thandapani (Univ. of Madras, Chennai, India)
         Krishnan Thangavelu (Pachiappa's College, Chennai, India)
	 Ekambaram Chandrasekaran (Presidency College, Chennai, India)

Abstract:
 Oscillation criteria are established for solutions of forced and
 unforced second-order neutral difference equations with positive
 and negative coefficients. These results generalize some existing
 results in the literature. Examples are provided to illustrate
 our results.
 
Submitted August 7, 2009. Published November 12, 2009.
Math Subject Classifications: 39A10.
Key Words: Oscillation; neutral difference equations;
           positive and negative coefficients.