About the Cover: Complex Finite Differences of Higher Order

IF 0.6 4区 数学 Q3 MATHEMATICS
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引用次数: 0

Abstract

In his recent work, Bengt Fornberg describes the construction of finite difference schemes (FDS) for accurate numerical computation of higher order derivatives of analytic functions. In this note we introduce the characteristic function of these schemes and explore how it encodes properties of the FDS. Visualizations of the characteristic function and their modifications allow one to read off these properties by visual inspection of phase portraits. The cover of this volume shows a phase portrait of a function which is related to a FDS with nine nodes that approximates the 4th derivative with an error of order \(h^8\).

Abstract Image

关于封面高阶复杂有限差分
本特-福恩伯格(Bengt Fornberg)在其最新著作中描述了有限差分方案(FDS)的构造,该方案用于解析函数高阶导数的精确数值计算。在本说明中,我们将介绍这些方案的特征函数,并探讨它如何编码有限差分方案的属性。通过对特征函数及其修正的可视化,我们可以直观地观察相位肖像来解读这些特性。本卷的封面展示了一个函数的相位肖像,该函数与具有九个节点的 FDS 有关,它以 \(h^8\) 的误差逼近第 4 次导数。
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来源期刊
Computational Methods and Function Theory
Computational Methods and Function Theory MATHEMATICS, APPLIED-MATHEMATICS
CiteScore
3.20
自引率
0.00%
发文量
44
审稿时长
>12 weeks
期刊介绍: CMFT is an international mathematics journal which publishes carefully selected original research papers in complex analysis (in a broad sense), and on applications or computational methods related to complex analysis. Survey articles of high standard and current interest can be considered for publication as well.
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