Hierarchical LU decomposition based preconditioners for BEM
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Submission date: 11. May. 2004
published in: Computing, 74 (2005) 3, p. 225-247
DOI number (of the published article): 10.1007/s00607-004-0099-6
MSC-Numbers: 65F05, 65F30, 65F50
Keywords and phrases: hierarchical matrices, fast solvers, boundary elements
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The adaptive cross approximation method can be used to efficiently approximate stiffness matrices arising from boundary element applications by hierarchical matrices. In this article an approximative LU decomposition in the same format is presented which can be used for preconditioning the resulting coefficient matrices efficiently. If the LU decomposition is computed with high precision, it may even be used as a direct yet efficient solver.