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- W2023003255 abstract "Shifted matrices, which differ by a multiple of the identity only, generate the same Krylov subspaces with respect to any fixed vector. Frommer and Glassner [5] develop a variant of the restarted GMRES method for such shifted systems at the expense of only one matrix-vector multiplication per iteration. However, restarting slows down the convergence, even stagnation. We present a variant of the restarted GMRES augmented with some eigenvectors for the shifted systems. The convergence can be much faster at little extra expense. Numerical experiments show its efficiency." @default.
- W2023003255 created "2016-06-24" @default.
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- W2023003255 date "2003-08-01" @default.
- W2023003255 modified "2023-09-23" @default.
- W2023003255 title "Restarted Gmres Augmented With Eigenvectors For Shifted Linear Systems * Supported by the National Natural Science Foundation of China and the Science and Technology Developing Foundation of University in Shanghai of China" @default.
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- W2023003255 doi "https://doi.org/10.1080/0020716031000103330" @default.
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