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- W4381330750 abstract "Iterative methods and especially Krylov subspace methods (KSM) are a very useful numerical tool in solving for large and sparse linear systems problems arising in science and engineering modeling. More recently, the nested loop KSM have been proposed that improve the convergence of the traditional KSM. In this article, we review the residual cutting (RC) and the generalized residual cutting (GRC) that are nested loop methods for large and sparse linear systems problems. We also show that GRC is a KSM that is equivalent to Orthomin with a variable preconditioning. We use the modified Gram–Schmidt method to derive a stable GRC algorithm. We show that GRC presents a general framework for constructing a class of “hybrid” (nested) KSM based on inner loop method selection. We conduct numerical experiments using nonsymmetric indefinite matrices from a widely used library of sparse matrices that validate the efficiency and the robustness of the proposed methods." @default.
- W4381330750 created "2023-06-21" @default.
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- W4381330750 date "2023-06-20" @default.
- W4381330750 modified "2023-09-23" @default.
- W4381330750 title "The generalized residual cutting method and its convergence characteristics" @default.
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- W4381330750 doi "https://doi.org/10.1002/nla.2517" @default.
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