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- W2020382842 abstract "Given the generalized symmetric eigenvalue problem Ax=λMx, with A semidefinite and M definite, we analyse some algebraic formulations for the approximation of the smallest non-zero eigenpairs, assuming that a sparse basis for the null space is available. In particular, we consider the inexact version of the Shift-and-Invert Lanczos method, and we show that apparently different algebraic formulations provide the same approximation iterates, under some natural hypotheses. Our results suggest that alternative strategies need to be explored to really take advantage of the special problem setting, other than reformulating the algebraic problem. Experiments on a real application problem corroborate our theoretical findings. Copyright © 2002 John Wiley & Sons, Ltd." @default.
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- W2020382842 date "2003-01-01" @default.
- W2020382842 modified "2023-09-27" @default.
- W2020382842 title "Algebraic formulations for the solution of the nullspace-free eigenvalue problem using the inexact Shift-and-Invert Lanczos method" @default.
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- W2020382842 doi "https://doi.org/10.1002/nla.307" @default.
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