Abstract
A refined a posteriori error analysis for symmetric eigenvalue problems and the convergence of the first-order adaptive finite element method (AFEM) is presented. The H 1 stability of the L 2 projection provides reliability and efficiency of the edge-contribution of standard residual-based error estimators for P 1 finite element methods. In fact, the volume contributions and even oscillations can be omitted for Courant finite element methods. This allows for a refined averaging scheme and so improves (Mao et al. in Adv Comput Math 25(1–3):135–160, 2006). The proposed AFEM monitors the edge-contributions in a bulk criterion and so enables a contraction property up to higher-order terms and global convergence. Numerical experiments exploit the remaining L 2 error contributions and confirm our theoretical findings. The averaging schemes show a high accuracy and the AFEM leads to optimal empirical convergence rates.
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Supported by the DFG Research Center MATHEON “Mathematics for key technologies” in Berlin and the Hausdorff Institute for Mathematics in Bonn, Germany.
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Carstensen, C., Gedicke, J. An oscillation-free adaptive FEM for symmetric eigenvalue problems. Numer. Math. 118, 401–427 (2011). https://doi.org/10.1007/s00211-011-0367-2
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DOI: https://doi.org/10.1007/s00211-011-0367-2