The high-level error bound for shifted surface spline interpolation

Details The high-level error bound for shifted surface spline interpolation The high-level error bound for shifted surface spline interpolation

2006-01-09

arxiv.org/abs/math/0601162v1

Mathematics

Numerical Analysis

14 pages, radial basis functions, approximation theory

Scientific paper

Radial function interpolation of scattered data is a frequently used method for multivariate data fitting. One of the most frequently used radial functions is called shifted surface spline, introduced by Dyn, Levin and Rippa in \cite{Dy1} for $R^{2}$. Then it's extended to $R^{n}$ for $n\geq 1$. Many articles have studied its properties, as can be seen in \cite{Bu,Du,Dy2,Po,Ri,Yo1,Yo2,Yo3,Yo4}. When dealing with this function, the most commonly used error bounds are the one raised by Wu and Schaback in \cite{WS}, and the one raised by Madych and Nelson in \cite{MN2}. Both are $O(d^{l})$ as $d\to 0$, where $l$ is a positive integer and $d$ is the fill-distance. In this paper we present an improved error bound which is $O(\omega^{1/d})$ as $d\to 0$, where $0<\omega <1$ is a constant which can be accurately calculated.

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