Incomplete blockwise factorizations of (block) H-matrices |
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Institution: | Department of Mathematics The University of Nijmegen Toernooiveld 6525 ED Nijmegen, Netherlands |
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Abstract: | The use of incomplete blockwise factorizations as preconditioners in conjugate gradient like methods has become more and more popular in recent years. Most of the theory concerning existence and applicability of these factorizations has been limited to M-matrices so far. Here we introduce a more general definition of block H-matrices (Robert 8]) and we extend the theory to this class of matrices. |
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