Superconvergence for triangular finite elements
- Cite this article as:
- Chen, C. Sci. China Ser. A-Math. (1999) 42: 917. doi:10.1007/BF02880383
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Based on two classes of the orthogonal expansions in a triangle, superconvergence of m-degree triangular finite element solution (for evenm) and its average gradient (for oddm) at symmetric points for a second order elliptic problem are studied. There are no other superconvergence points independent of the coefficients of elliptic equation.