Superconvergence of the gradient of Galerkin approximations for elliptic problems
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论文关键词：Galerkin method,finite element method,superconvergence estimates
论文评审过程：Received 26 May 1986, Available online 1 April 2002.
论文官网地址：https://doi.org/10.1016/0377-0427(87)90151-8
