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1. Sensitivity of RBF interpolation on an otherwise uniform grid with a point omitted or slightly shifted

Author

Lauren R. Bridge and John P. Boyd

Subjects
Numerical Analysis, Applied Mathematics, Gaussian, Mathematical analysis, Grid, Multivariate interpolation, Computational Mathematics, symbols.namesake, Quadratic equation, symbols, Gaussian grid, Point (geometry), Radial basis function, Mathematics, Interpolation
Abstract

Radial basis functions are popular for interpolation on a scattered or irregular grid. However, theory for an irregular grid is mostly limited to proofs of convergence. Here, we present theory and numerical experiments for two specific cases. The first is an otherwise uniform grid of spacing h in which one point is shifted by an amount sh. The second is a uniform grid with one point omitted. We discuss Gaussian, hyperbolic secant, and inverse quadratic RBFs. more...

Published
2010
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