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- W2927587072 abstract "We consider iterative solvers for large, sparse, symmetric linear systems with a saddle-point structure. Since such systems are indefinite, the conjugate gradient (CG) method is not naturally designed for solving them. However, in the case of a maximally rank-deficient leading block, we prove that there are two sufficient conditions that allow for CG to be used. We show that the conditions are satisfied for a model time-harmonic Maxwell problem. To support our analysis, we present several numerical experiments for three-dimensional problems on complicated computational domains with constant and variable coefficients." @default.
- W2927587072 created "2019-04-11" @default.
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- W2927587072 date "2019-10-01" @default.
- W2927587072 modified "2023-10-09" @default.
- W2927587072 title "Conjugate gradient for nonsingular saddle-point systems with a maximally rank-deficient leading block" @default.
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- W2927587072 doi "https://doi.org/10.1016/j.cam.2019.02.016" @default.
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