摘要

This paper concerns the approximate controllability of a semilinear functional differential equation where the linear part is non-densely defined and satisfies the Hille-Yosida condition on a Banach space X. By considering the extrapolated semigroup corresponding to the linear part and applying Banach fixed-point theorem, we deduce fairly general conditions under which the semi linear functional differential equation is approximately controllable. There will as well be an application of our results to reaction-diffusion equation with a control term addressed.