Electronic Journal of Differential Equations,
Vol. 2006(2006), No. 06, pp. 1-6.

Title: Boundedness of solutions to fourth order differential equations
       with oscillatory restoring and forcing terms
       
Author: Babatunde S. Ogundare (Obafemi Awolowo Univ., Ile-Ife, Nigeria)

Abstract: 
 This article concerns the fourth order differential equation
 $$
 x^{(iv)}+ax'''+bx''+g(x')+h(x)=p(t).
 $$
 Using the Cauchy formula for the particular solution of
 non-homogeneous linear differential equations with constant
 coefficients, we prove that the solution and its derivatives
 up to order three are bounded.
 
Submitted Submitted September 7, 2005. Published January 11, 2006.
Math Subject Classifications: 34C10, 34C11.
Key Words: Fourth order  differential equation; bounded solution;
           oscillatory solution; restoring and forcing terms.