Geodesic
Error estimates for finite element approximations of elliptic control problems
Discussiones Mathematicae. Differential Inclusions, Control and Optimization, Tome 27 (2007) no. 1, pp. 7-22.

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We investigate finite element approximations of one-dimensional elliptic control problems. For semidiscretizations and full discretizations with piecewise constant controls we derive error estimates in the maximum norm.
Keywords: Linear quadratic optimal control problems, elliptic equations, finite element approximations, error estimates 
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Alt, Walter; Bräutigam, Nils; Rösch, Arnd. Error estimates for finite element approximations of elliptic control problems. Discussiones Mathematicae. Differential Inclusions, Control and Optimization, Tome 27 (2007) no. 1, pp. 7-22. http://geodesic.mathdoc.fr/item/DMDICO_2007_27_1_a0/

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