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A posteriori error estimators for obstacle problems – another look

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Abstract

We show that a posteriori estimators for the obstacle problem are easily obtained from the theory for linear equations. The theory would be even simpler if the Lagrange multiplier does not have a nonconforming contribution as it has in actual finite element computations.

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  1. Faculty of Mathematics, Ruhr-University, 44780, Bochum, Germany

    Dietrich Braess

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  1. Dietrich Braess
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Correspondence to Dietrich Braess.

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Braess, D. A posteriori error estimators for obstacle problems – another look. Numer. Math. 101, 415–421 (2005). https://doi.org/10.1007/s00211-005-0634-1

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  • DOI: https://doi.org/10.1007/s00211-005-0634-1

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