Abstract
Anℓ 1-penalty scheme in function space for the optimal control of elliptic variational inequalities is proposed. In anL 2-tracking context, an iterative algorithm is proven to generate a sequence which converges to some weakly C-stationary point and, under certain conditions, even to a strongly stationary point of the original problem. In the case of point tracking control, where the objective contains pointwise function evaluations of the state variable, a modified model problem with constraints on the dual variable associated with the variational inequality constraint is introduced and an auxiliary problem that penalizes not only the complementarity, but also the state constraint, is analyzed. Passing to the limit with the penalty parameter in the stationarity system of the auxiliary problem yields some weak form of a C-stationarity system for the original problem if the additional dual constraints are not active. Finally, numerical results obtained by the new algorithms are documented.
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Hintermüller, M., Löbhard, C., Tber, M.H. (2015). An ℓ 1-Penalty Scheme for the Optimal Control of Elliptic Variational Inequalities. In: Al-Baali, M., Grandinetti, L., Purnama, A. (eds) Numerical Analysis and Optimization. Springer Proceedings in Mathematics & Statistics, vol 134. Springer, Cham. https://doi.org/10.1007/978-3-319-17689-5_7
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