Conversions between barycentric, RKFUN, and Newton representations of rational interpolants

Elsworth, Steven and Güttel, Stefan (2017) Conversions between barycentric, RKFUN, and Newton representations of rational interpolants. Linear Algebra and its Applications (2017.40). ISSN 0024-3795 (In Press)

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Abstract

We derive explicit formulas for converting between rational interpolants in barycentric, rational Krylov (RKFUN), and Newton form. We show applications of these conversions when working with rational approximants produced by the AAA algorithm [Y. Nakatsukasa, O. Sete, L. N. Trefethen, SIAM J. Sci. Comput. 40(3), 2018] within the Rational Krylov Toolbox and for the solution of nonlinear eigenvalue problems.

Item Type: Article
Subjects: MSC 2010, the AMS's Mathematics Subject Classification > 65 Numerical analysis
Depositing User: Stefan Güttel
Date Deposited: 04 Oct 2018 10:49
Last Modified: 04 Oct 2018 10:49
URI: http://eprints.maths.manchester.ac.uk/id/eprint/2665

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