Symmetric Point Structure of Superconvergence for Cubic Triangular Elements—A Consultation with Zhu

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Abstract

Superconvergence structures for rectangular and triangular finite elements are summarized. Two debatable issues in Zhu's paper [18] are discussed. A superclose polynomial to cubic triangular finite element is constructed by area coordinate.

Keywords:

Cubic triangular element Superconvergence Symmetric points.
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Symmetric Point Structure of Superconvergence for Cubic Triangular Elements—A Consultation with Zhu. (2021). Journal of Computational Mathematics, 21(6), 727-732. https://global-sci.com/index.php/JCM/article/view/11596