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    Nonsingularity Study of SAI Preconditioners for M-matrices
    15 years 22 days ago
    Nonsingularity Study of SAI Preconditioners for M-matrices
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    In this paper, we study the theoretical properties of sparse approximate inverse (SAI) preconditioners. Particularly, we show that for Mmatrices, nonnegativeness is the key to com...
    Kai Wang, Rui Wang
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