Optimal control under reduced regularity

  • Authors:
  • Thomas Apel;Gunter Winkler

  • Affiliations:
  • Universität der Bundeswehr München, Fak. für Mathematik und Bauinformatik, 85579 Neubiberg, Germany;Universität der Bundeswehr München, Fak. für Mathematik und Bauinformatik, 85579 Neubiberg, Germany

  • Venue:
  • Applied Numerical Mathematics
  • Year:
  • 2009

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Abstract

This paper deals with a linear quadratic optimal control problem with elliptic PDE constraints in three-dimensional domains with singularities. It is proved that the optimal control can be calculated by the finite element method at a rate of O(h^2) provided that the mesh is sufficiently graded. The approximation of this control is computed from a piecewise constant approximation followed by a postprocessing step. Although the results are similar to the two-dimensional case, the proofs changed significantly.