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- W3023373995 abstract "An approach is given for solving large linear systems that combines Krylov methods with use of two different grid levels. Eigenvectors are computed on the coarse grid and used to deflate eigenvalues on the fine grid. GMRES-type methods are first used on both the coarse and fine grids. Then another approach is given that has a restarted BiCGStab (or IDR) method on the fine grid. While BiCGStab is generally considered to be a non-restarted method, it works well in this context with deflating and restarting. Tests show this new approach can be very efficient for difficult linear equations problems." @default.
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- W3023373995 date "2020-05-06" @default.
- W3023373995 modified "2023-10-17" @default.
- W3023373995 title "Two-Grid Deflated Krylov Methods for Linear Equations" @default.
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- W3023373995 doi "https://doi.org/10.48550/arxiv.2005.03070" @default.
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