Hermite interpolation of nonsmooth functions preserving boundary conditions |
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Authors: | V Girault L R Scott |
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Institution: | Laboratoire d'Analyse Numérique, Université Pierre et Marie Curie, 75252 Paris cedex 05, France ; Department of Mathematics and the Computation Institute, University of Chicago, Chicago, Illinois 60637-1581 |
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Abstract: | This article is devoted to the construction of a Hermite-type regularization operator transforming functions that are not necessarily into globally finite-element functions that are piecewise polynomials. This regularization operator is a projection, it preserves appropriate first and second order polynomial traces, and it has approximation properties of optimal order. As an illustration, it is used to discretize a nonhomogeneous Navier-Stokes problem, with tangential boundary condition. |
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Keywords: | Hermite interpolation regularization divergence-zero finite elements Leray-Hopf lifting |
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