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Mortar elements form a family of special non-overlapping domain decomposition methods which allows the coupling of different triangulations across subdomain boundaries. We discuss and analyze a multilevel preconditioner for mortar finite elements on nonmatching triangulations. The analysis is carried out within the abstract framework of additive Schwarz methods. Numerical results show a performance of our preconditioner as predicted by the theory. Our condition number estimate depends quadratically on the number of refinement levels.
Key Words: domain decomposition,; elliptic mortar finite element method,; non-matching triangulations,; preconditioned conjugate gradients,; additive Schwarz methods.
Published Online: 2004-04-01
Published in Print: 2004-04-01
Copyright 2004, Walter de Gruyter
