UKRAINIAN MATHEMATICAL JOURNAL, vol.60, no.5, pp.799-809, 2008 (Journal Indexed in SCI)
Article / Article
Title of Journal :
UKRAINIAN MATHEMATICAL JOURNAL
Some new oscillation criteria are given for general nonlinear second-order ordinary differential equations with damping of the form x '' + p (t) x' + q ( t) f ( x) = 0, where f is monotone or non-monotone. Our results generalize and extend some earlier results of Deng.