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- W2154445530 abstract "The effectiveness of relaxation schemes for solving the systems of algebraic equations which arise from spectral discretizations of elliptic equations is examined. Iterative methods are an attractive alternative to direct methods because Fourier transform techniques enable the discrete matrix-vector products to be computed almost as efficiently as for corresponding but sparse finite difference discretizations. Preconditioning is found to be essential for acceptable rates of convergence. Preconditioners based on second-order finite difference methods are used. A comparison is made of the performance of different relaxation methods on model problems with a variety of conditions specified around the boundary. The investigations show that iterations based on incomplete LU decompositions provide the most efficient methods for solving these algebraic systems." @default.
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- W2154445530 date "1987-05-01" @default.
- W2154445530 modified "2023-09-27" @default.
- W2154445530 title "Relaxation schemes for spectral multigrid methods" @default.
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- W2154445530 doi "https://doi.org/10.1016/0377-0427(87)90013-6" @default.
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