Journal of Inequalities and Applications
Volume 2010 (2010), Article ID 768469, 16 pages
Research Article

Controllability for Variational Inequalities of Parabolic Type with Nonlinear Perturbation

Division of Mathematical Sciences, Pukyong National University, Busan 608-737, South Korea

Received 21 October 2009; Accepted 1 February 2010

Academic Editor: Jong Kim

Copyright © 2010 Jin-Mun Jeong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


We deal with the approximate controllability for the nonlinear functional differential equation governed by the variational inequality in Hilbert spaces and present a general theorems under which previous results easily follow. The common research direction is to find conditions on the nonlinear term such that controllability is preserved under perturbation.