Electronic Journal of Differential Equations,
Vol. 2012 (2012), No. 151, pp. 1-11.

Title: Forced oscillation for higher order functional 
       differential equations

Authors: Yuan Gong Sun   (Univ. of Jinan, China)
         Taher S. Hassan (Mansoura Univ., Egypt)

Abstract:
 We establish some oscillation criteria for the solutions to
 forced higher-order differential equations. We do not assume that
 the forcing term is the n-th derivative of an oscillatory function,
 and do not assume that the coefficients are of a definite sign.
 Our results are illustrated with examples.

Submitted June 5, 2012. Published August 31, 2012.
Math Subject Classifications: 34C10, 34C15.
Key Words: Oscillation; higher order; differential equations.