A Fast Solver for an H₁ Regularized PDE-Constrained Optimization Problem

In this paper we consider PDE-constrained optimization problems which incorporate an H 1 regularization control term. We focus on a time-dependent PDE, and consider both distributed and boundary control. The problems we consider include bound constraints on the state, and we use a Moreau-Yosida penalty function to handle this. We propose Krylov solvers and Schur complement preconditioning strategies for the different problems and illustrate their performance with numerical examples.