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SUPERCONVERGENCE OF TETRAHEDRAL QUADRATIC FINITE ELEMENTS

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文摘 For a model elhptic boundary value problem we will prove that on strongly regular families of uniform tetrahedral partitions of a pohyhedral domain, the gradient of the quadratic finite element approximation is superclose to the gradient of the quadratic La-grange interpolant of the exact solution. This supercloseness will be used to construct a post-processing that increases the order of approximation to the gradient in the global L^2-norm。
来源 Journal of Computational Mathematics ,2005,23(1):27-36 【核心库】
关键词 tetrahedron ; superconvergence ; supercloseness ; post-processing ; gauss points
地址

1. Korteweg-de Vries Institute for Mathematics, Faculty of Science,University of Amsterdam, Netherlands  

2. Mathematical Institute, Academy of Sciences of the Czech Republic

语种 英文
文献类型 研究性论文
ISSN 0254-9409
学科 数学
基金 supported by a Fellowship of the Royal Netherlands Academy of Arts and Sciences ;  捷克科学基金会(GACR)资助
文献收藏号 CSCD:2235765

参考文献 共 31 共2页

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引证文献 1

1 Antti Hannukainen NODAL O(h~4)-SUPERCONVERGENCE IN 3D BY AVERAGING PIECEWISE LINEAR, BILINEARR, AND TRILINEAR FE APPROXIMATIONS Journal of Computational Mathematics,2010,28(1):1-10
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