Article,

Finite element approximation of the Laplace-Beltrami operator on a surface with boundary.

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Numerische Mathematik, 141 (1): 141-172 (2019)
DOI: 10.1007/s00211-018-0990-2

Abstract

We develop a finite element method for the Laplace–Beltrami operator on a surface with boundary and nonhomogeneous Dirichlet boundary conditions. The method is based on a triangulation of the surface and the boundary conditions are enforced weakly using Nitsche’s method. We prove optimal order a priori error estimates for piecewise continuous polynomials of order k≥1 in the energy and L2 norms that take the approximation of the surface and the boundary into account.

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