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Superconvergence of the local discontinuous Galerkin method for elliptic problems on Cartesian grids. (English) Zbl 1041.65080

MSC:
65N12 Stability and convergence of numerical methods for boundary value problems involving PDEs
65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs
35J25 Boundary value problems for second-order elliptic equations
Software:
deal.ii
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