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A posteriori error estimators in the finite element method. (English) Zbl 0757.65109
A structured approach to the a posteriori estimation of the error in the computed approximation is obtained via the finite element method.

65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs
65N15 Error bounds for boundary value problems involving PDEs
35J25 Boundary value problems for second-order elliptic equations
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