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- W2950836657 abstract "We propose a new and simpler residual based a posteriori error estimator for finite element approximation of the elliptic obstacle problem. The results in the article are two fold. Firstly, we address the influence of the inhomogeneous Dirichlet boundary condition in {em a posteriori} error control of the elliptic obstacle problem. Secondly by rewriting the obstacle problem in an equivalent form, we derive simpler {em a posteriori} error bounds which are free from min/max functions. To accomplish this, we construct a post-processed solution $tilde u_h$ of the discrete solution $u_h$ which satisfies the exact boundary conditions although the discrete solution $u_h$ may not satisfy. We propose two post processing methods and analyze them. We remark that the results known in the literature are either for the homogeneous Dirichlet boundary condition or that the estimator is only weakly reliable in the case of inhomogeneous Dirichlet boundary condition." @default.
- W2950836657 created "2019-06-27" @default.
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- W2950836657 date "2016-11-09" @default.
- W2950836657 modified "2023-10-01" @default.
- W2950836657 title "Inhomogeneous Dirichlet Boundary Condition in the A Posteriori Error Control of the Obstacle Problem" @default.
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