Optimal obstacle control problem for semilinear evolutionary bilateral variational inequalities ✩

This paper is concerned with an optimal control problem for semilinear evolutionary bilateral variational inequalities. The pair of the upper and lower obstacles is taken as the control and the corresponding state is chosen close to a desired target profile with the norms of the obstacles not too large. Existence and optimality conditions for the problem are derived.  2005 Elsevier Inc. All rights reserved.