Abstract
Two classes of SSOR-type incomplete block factorization methods are proposed for preconditioning of linear algebraic systems of equations with block banded matrices of complex structure. Correctness conditions are derived for these methods in application to M-matrices and their efficiency is demonstrated by numerical experiments with linear algebraic systems obtained by discretization of the three-dimensional Poisson equation using quadratic and cubic serendipity finite elements.
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Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova AN SSSR, Vol. 159, pp. 5–22, 1987.
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Eremin, A.Y., Kolotilina, L.Y. Incomplete block factorization methods for complex-structure matrices. J Math Sci 47, 2821–2834 (1989). https://doi.org/10.1007/BF01305210
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DOI: https://doi.org/10.1007/BF01305210