Dual finite element analysis for elliptic problems with obstacles on the boundary. I. (English) Zbl 0422.65065


65N30 Finite element, Rayleigh-Ritz and Galerkin methods for boundary value problems involving PDEs
35J25 Boundary value problems for second-order elliptic equations
65K10 Numerical optimization and variational techniques
65N15 Error bounds for boundary value problems involving PDEs
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