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- W2079308547 abstract "In this article we introduce new bounds on the effective condition number of deflated and preconditioned-deflated symmetric positive definite linear systems. For the case of a subdomain deflation such as that of Nicolaides [SIAM J. Numer. Anal., 24 (1987), pp. 355--365], these theorems can provide direction in choosing a proper decomposition into subdomains. If grid refinement is performed, keeping the subdomain grid resolution fixed, the condition number is insensitive to the grid size. Subdomain deflation is very easy to implement and has been parallelized on a distributed memory system with only a small amount of additional communication. Numerical experiments for a steady-state convection-diffusion problem are included." @default.
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- W2079308547 date "2001-01-01" @default.
- W2079308547 modified "2023-09-23" @default.
- W2079308547 title "On the Construction of Deflation-Based Preconditioners" @default.
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- W2079308547 doi "https://doi.org/10.1137/s1064827500373231" @default.
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