Vandermonde with Arnoldi
- π€ Speaker: Yuji Nakatsukasa (University of Oxford; National Institute of Informatics)
- π Date & Time: Tuesday 10 December 2019, 13:30 - 14:00
- π Venue: Seminar Room 1, Newton Institute
Abstract
Vandermonde matrices are exponentially ill-conditioned, rendering the familiar “polyval(polyfit)” algorithm for polynomial interpolation and least-squares fitting ineffective at higher degrees. We show that Arnoldi orthogonalization fixes the problem.
Series This talk is part of the Isaac Newton Institute Seminar Series series.
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Yuji Nakatsukasa (University of Oxford; National Institute of Informatics)
Tuesday 10 December 2019, 13:30-14:00