Volume 36 • Number 4 • 2013   • Oscillation Theorems for Second Order Nonlinear Differential Equations with Damping M. J. Saad, N. Kumaresan and K. Ratnavelu Abstract. Some oscillation criteria for solutions of a general ordinary differential equation of second order of the form \begin{equation*}(r(t)\psi(x(t))\dot{x}(t))^{.}+h(t)\dot{x}(t)+q(t)\phi(g(x(t)),r(t)\psi(x(t))\dot{x}(t))=H(t,x(t),\dot{x}(t))\end{equation*} with alternating coefficients are discussed. Our results improve and extend some existing results in the literature. Some illustrative examples are given with its numerical solutions which are computed using Runge Kutta method of fourth order. 2010 Mathematics Subject Classification: 34A34, 34K11 Full text: PDF