OSCILLATION THEOREMS FOR SECOND ORDER FORCED NONLINEAR DIFFERENTIAL EQUATIONS WITH DELAYED ARGUMENT

Jing Shao (P. R. China) and Fanwei Meng (P. R. China)

Received February 22, 2009

References:

[1] E. F. Beckenbach and R. Bellman, Inequalities, Springer-Verlag, Berlin, 1961. [2] Y. G. Sun and J. S. W. Wong, Oscillation criteria for second order forced ordinary differential equations with mixed nonlinearities, J. Math. Anal. Appl. 334(1) (2007), 549-560. [3] Y. G. Sun and F. W. Meng, Interval criteria for oscillation of second-order differential equations with mixed nonlinearities, Appl. Math. Comput. 198(1) (2008), 375-381. [4] J. S. W. Wong, On Kamenev-type oscillation theorems for second-order differential equations with damping, J. Math. Anal. Appl. 258(1) (2001), 244-257.

Keywords and phrases: oscillation, second order, forced nonlinear differential equations, delayed argument.