Journal of applied mathematics & informatics
- Volume 16 Issue 1_2
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- Pages.19-35
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- 2004
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- 2734-1194(pISSN)
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- 2234-8417(eISSN)
RECURSIVE TWO-LEVEL ILU PRECONDITIONER FOR NONSYMMETRIC M-MATRICES
- Guessous, N. (Ecole Normale Superieure de Fes, Department de mathematique et informatique) ;
- Souhar, O. (Faculte des Sciences Dhar-Mahraz, Department of de mathematique et informatique)
- Published : 2004.09.01
Abstract
We develop in this paper some preconditioners for sparse non-symmetric M-matrices, which combine a recursive two-level block I LU factorization with multigrid method, we compare these preconditioners on matrices arising from discretized convection-diffusion equations using up-wind finite difference schemes and multigrid orderings, some comparison theorems and experiment results are demonstrated.
Keywords
- Sparse linear system;
- block incomplete LU factorization;
- Schur complement;
- convection-diffusion equations.