Stabilization-free HHO a posteriori error control

The known a posteriori error analysis of hybrid high-order methods treats the stabilization contribution as part of the error and as part of the error estimator for an efficient and reliable error control. This paper circumvents the stabilization contribution on simplicial meshes and arrives at a st...

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Bibliographic Details
Published in:Numerische Mathematik 2023-08, Vol.154 (3-4), p.369-408
Main Authors: Bertrand, Fleurianne, Carstensen, Carsten, Gräßle, Benedikt, Tran, Ngoc Tien
Format: Article
Language:English
Subjects:
Adaptive algorithms
Error analysis
Finite element method
Mathematical and Computational Engineering
Mathematical and Computational Physics
Mathematical Methods in Physics
Mathematics
Mathematics and Statistics
Numerical Analysis
Numerical and Computational Physics
Simulation
Stabilization
Theoretical
Upper bounds
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Summary:The known a posteriori error analysis of hybrid high-order methods treats the stabilization contribution as part of the error and as part of the error estimator for an efficient and reliable error control. This paper circumvents the stabilization contribution on simplicial meshes and arrives at a stabilization-free error analysis with an explicit residual-based a posteriori error estimator for adaptive mesh-refining as well as an equilibrium-based guaranteed upper error bound (GUB). Numerical evidence in a Poisson model problem supports that the GUB leads to realistic upper bounds for the displacement error in the piecewise energy norm. The adaptive mesh-refining algorithm associated to the explicit residual-based a posteriori error estimator recovers the optimal convergence rates in computational benchmarks.
ISSN:0029-599X
0945-3245
DOI:10.1007/s00211-023-01366-8