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Preconditioning of linear least squares by robust incomplete factorization for implicitly held normal equations. (English) Zbl 1348.65066
MSC:
65F08 Preconditioners for iterative methods
65F20 Numerical solutions to overdetermined systems, pseudoinverses
65F50 Computational methods for sparse matrices
15A06 Linear equations (linear algebraic aspects)
15A23 Factorization of matrices
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