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math.NA2026
Linear-cost Polyharmonic Spline Interpolation of Arbitrary Degree
Christopher J. Geoga, Michael O'Neil
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) f…
math.NA2024
Fast Machine-Precision Spectral Likelihoods for Stationary Time Series
Christopher J. Geoga
We provide in this work an algorithm for approximating a very broad class of symmetric Toeplitz matrices to machine precision in time with applications to f…