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Superconvergence of the gradient of finite element solutions. (English) Zbl 0412.65051

65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs
65D05 Numerical interpolation
65L10 Numerical solution of boundary value problems involving ordinary differential equations
35A15 Variational methods applied to PDEs
Full Text: DOI EuDML
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