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- W757272725 abstract "An iterative algorithm for the Helmholtz equation is presented. This scheme was based on the preconditioned conjugate gradient method for the normal equations. The preconditioning is one cycle of a multigrid method for the discrete Laplacian. The smoothing algorithm is red-black Gauss-Seidel and is constructed so it is a symmetric operator. The total number of iterations needed by the algorithm is independent of h. By varying the number of grids, the number of iterations depends only weakly on k when k(3)h(2) is constant. Comparisons with a SSOR preconditioner are presented." @default.
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- W757272725 date "1984-06-01" @default.
- W757272725 modified "2023-10-06" @default.
- W757272725 title "Conjugate gradient coupled with multigrid for an indefinite problem" @default.
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- W757272725 hasPublicationYear "1984" @default.
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