Titlebook: Hierarchical Matrices: Algorithms and Analysis; Wolfgang Hackbusch Book 2015 Springer-Verlag Berlin Heidelberg 2015 efficient matrix algor

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Formatted Matrix Operations for Hierarchical Matricesore this chapter plays a crucial role for its implementation. Since the input and output data are presented in the .-matrix format, matrix operations are called .. These will be described algorithmically in Sections 7.1–7.6. More precisely, Section 7.1 is concerned with the .. Section 7.2 describes

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Miscellaneous Supplementse the approximate LU decomposition, this approximation can be used as a perfect preconditioner in the iterative solution. The hierarchical LU decomposition of sparse matrices can be improved by the choice of a special ternary cluster tree (see Section 9.2). Section 9.3 introduces the weak admissibil

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