%0 Journal Article %A Cemil Tunc %D 2012 %J International Journal of Mathematical and Computational Sciences %B World Academy of Science, Engineering and Technology %I Open Science Index 68, 2012 %T Instability of a Nonlinear Differential Equation of Fifth Order with Variable Delay %U https://publications.waset.org/pdf/7529 %V 68 %X In this paper, we study the instability of the zero solution to a nonlinear differential equation with variable delay. By using the Lyapunov functional approach, some sufficient conditions for instability of the zero solution are obtained. %P 1210 - 1212