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Local pointwise convergence of the 3D finite element

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Abstract

For an elliptic problem with variable coefficients in three dimensions, this article discusses local pointwise convergence of the three-dimensional (3D) finite element. First, the Green’s function and the derivative Green’s function are introduced. Secondly, some relationship of norms such as L2-norms, W1,∞-norms, and negative-norms in locally smooth subsets of the domain Ω is derived. Finally, local pointwise convergence properties of the finite element approximation are obtained.

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Correspondence to Jing-hong Liu or Qi-ding Zhu.

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The authors declare no conflict of interest.

Supported by Special Projects in Key Fields of Colleges and Universities in Guangdong Province (2022ZDZX3016), and Projects of Talents Recruitment of GDUPT.

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Liu, Jh., Zhu, Qd. Local pointwise convergence of the 3D finite element. Appl. Math. J. Chin. Univ. 38, 210–222 (2023). https://doi.org/10.1007/s11766-023-3911-9

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  • DOI: https://doi.org/10.1007/s11766-023-3911-9

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