Copyright © 2009 Zigen Ouyang 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.
A class of second-order nonlinear differential equations with damping term
are investigated in this paper. By using a new method, we obtain some new sufficient conditions for
the oscillation of the above equation, and some references are extended in this paper. Examples are
inserted to illustrate this result.