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On the asymptotic exactness of error estimators for linear triangular finite elements. (English) Zbl 0716.65098
See the preview in Zbl 0707.65072.

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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