A coupled mixed-Lagrange finite element formulation for linear elasticity is shown to be well-posed with optimal a priori error estimates even when the mixed-element subdomain has diameter O(h).
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A Coupling Method of Mixed and Lagrange Finite Elements for Linear Elasticity Problem
A coupled mixed-Lagrange finite element formulation for linear elasticity is shown to be well-posed with optimal a priori error estimates even when the mixed-element subdomain has diameter O(h).