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A posteriori error estimation for non-conforming quadrilateral finite elements. (English) Zbl 1071.65141

The author derives an a posteriori error estimator giving a computable upper bound on the error energy norm for finite element approximation using non-conforming finite elements.

MSC:

65N15 Error bounds 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
65N50 Mesh generation, refinement, and adaptive methods for boundary value problems involving PDEs
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