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- W3100489444 abstract "Lanczos-type algorithms are well known for their inherent instability. They typically breakdown when relevant orthogonal polynomials do not exist. Current approaches to avoiding breakdown rely on jumping over the non-existent polynomials to resume computation. This jumping strategy may have to be used many times during the solution process. We suggest an alternative to jumping which consists in switching between different algorithms that have been generated using different recurrence relations between orthogonal polynomials. This approach can be implemented as three different strategies: ST1, ST2, and ST3. We shall briefly recall how Lanczos-type algorithms are derived. Four of the most prominent such algorithms namely $A_4$, $A_{12}$, $A_5/B_{10}$ and $A_5/B_8$ will be presented and then deployed in the switching framework. In this paper, only strategy ST2 will be investigated. Numerical results will be presented." @default.
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- W3100489444 date "2014-09-01" @default.
- W3100489444 modified "2023-10-15" @default.
- W3100489444 title "A Switching Approach to Avoid Breakdown in Lanczos-Type Algorithms" @default.
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- W3100489444 doi "https://doi.org/10.12785/amis/080509" @default.
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