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Author

Michael O’Neil

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Preprint Aug 2026

Linear-cost Polyharmonic Spline Interpolation of Arbitrary Degree

We introduce a simple and performant approach for rapidly and accurately performing polyharmonic spline (PHS) interpolation using a combination of the fast multipole method (FMM) from computational electrostatics and the Vecchia approximation from the Gaussian process and sparse approximate inverse literatures. Using b...

Christopher J. Geoga, Michael O’Neil · 0 citations

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