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A posteriori error estimates for a discontinuous Galerkin approximation of second-order elliptic problems. (English) Zbl 1058.65120

MSC:
65N15 Error bounds for boundary value problems involving PDEs
65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs
35J05 Laplace operator, Helmholtz equation (reduced wave equation), Poisson equation
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