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On the Lánczos method for solving symmetric linear systems with several right-hand sides


Author: Youcef Saad
Journal: Math. Comp. 48 (1987), 651-662
MSC: Primary 65F10; Secondary 65F50
DOI: https://doi.org/10.1090/S0025-5718-1987-0878697-3
MathSciNet review: 878697
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Abstract: This paper analyzes a few methods based on the Lanczos algorithm for solving large sparse symmetric linear systems with several right-hand sides. The methods examined are suitable for the situation when the right sides are not too different from one another, as is often the case in time-dependent or parameter-dependent problems. We propose a theoretical error bound for the approximation obtained from a projection process onto a Krylov subspace generated from processing a previous right-hand side.


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Additional Information

DOI: https://doi.org/10.1090/S0025-5718-1987-0878697-3
Article copyright: © Copyright 1987 American Mathematical Society

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