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Optimal \(L^\infty\) estimates for the finite element method on irregular meshes. (English) Zbl 0349.65060

MSC:
65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs
65N15 Error bounds for boundary value problems involving PDEs
41A25 Rate of convergence, degree of approximation
41A15 Spline approximation
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