| Issue |
ESAIM: M2AN
Volume 39, Number 5, September-October 2005
|
|
|---|---|---|
| Page(s) | 883 - 908 | |
| DOI | https://doi.org/10.1051/m2an:2005039 | |
| Published online | 15 September 2005 | |
Difference operators from interpolating moving least squares and their deviation from optimality
Institut Computational Mathematics, TU Braunschweig,
Pockelsstraße 14,
38106 Braunschweig, Germany. t.sonar@tu-bs.de
Received:
31
August
2004
We consider the classical Interpolating Moving Least Squares (IMLS) interpolant as defined by Lancaster and Šalkauskas [Math. Comp. 37 (1981) 141–158] and compute the first and second derivative of this interpolant at the nodes of a given grid with the help of a basic lemma on Shepard interpolants. We compare the difference formulae with those defining optimal finite difference methods and discuss their deviation from optimality.
Mathematics Subject Classification: 39A70 / 39A12 / 65D05 / 65D25
Key words: Difference operators / moving least squares interpolation / order of approximation.
© EDP Sciences, SMAI, 2005
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