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Erschienen in: Journal of Scientific Computing 2/2014

01.08.2014

Nonperiodic Trigonometric Polynomial Approximation

verfasst von: Hillel Tal-Ezer

Erschienen in: Journal of Scientific Computing | Ausgabe 2/2014

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Abstract

The most common approach for approximating non-periodic function defined on a finite interval is based on considering polynomials as basis functions. In this paper we will address the non-optimallity of polynomial approximation and suggest to switch from powers of \(x\) to powers of \(\sin (px)\) where \(p\) is a parameter which depends on the dimension of the approximating subspace. The new set does not suffer from the drawbacks of polynomial approximation and by using them one can approximate analytic functions with spectral accuracy. An important application of the new basis functions is related to numerical integration. A quadrature based on these functions results in higher accuracy compared to Legendre quadrature.

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Metadaten
Titel
Nonperiodic Trigonometric Polynomial Approximation
verfasst von
Hillel Tal-Ezer
Publikationsdatum
01.08.2014
Verlag
Springer US
Erschienen in
Journal of Scientific Computing / Ausgabe 2/2014
Print ISSN: 0885-7474
Elektronische ISSN: 1573-7691
DOI
https://doi.org/10.1007/s10915-013-9797-6

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