Approximate Controllability of Second-Order Systems with State-Dependent Delay.

In this article, we consider the approximate controllability for a class of second-order nonlinear functional differential equations with state-dependent delay. Assuming the approximate controllability of the corresponding linearized equation, we obtain sufficient conditions for the approximate controllability of the nonlinear second-order equations. Examples are presented to show the application of the proposed result. [ABSTRACT FROM AUTHOR]