... Cheng, and G. Zhang, A classification scheme for nonoscillatory solutions of a higher order neutral nonlinear difference equation, Journal of the Australian Mathematical Society. Series A 67 (1999), ... Cheng, Partial Difference Equations, Taylor & Francis, London, 2003.[4] S. S. Cheng, G. Zhang, and W T. Li, On a higher order neutral difference equation, MathematicalAnalysis and Applications ... n ≥ N1.(3.6) A CLASSIFICATION SCHEME FOR NONOSCILLATORY SOLUTIONS OF A HIGHER ORDER NEUTRAL DIFFERENCE EQUATIONZHI-QIANG ZHU, GEN-QIANG WANG, AND SUI SUN CHENGReceived 25 May 2005; Revised...