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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Acta Mathematica Hun...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
Acta Mathematica Hungarica
Article . 1993 . Peer-reviewed
License: Springer TDM
Data sources: Crossref
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
zbMATH Open
Article . 1993
Data sources: zbMATH Open
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On the order of magnitude of fundamental polynomials of hermite interpolation

On the order of magnitude of fundamental polynomials of Hermite interpolation
Authors: Szabados, J.;

On the order of magnitude of fundamental polynomials of hermite interpolation

Abstract

The author deals with Hermite interpolation polynomials of the form \[ H_{mn} (f,x):= \sum_{k=1}^ n \sum_{j=0}^{m-1} f^{(j)} (x_{kn}) A_{jk}(x) \] for a function \(f\) that is \(m-1\) times continuously differentiable on the interval \([-1,1]\) (\(m\) an arbitrary positive integer) and a system of arbitrary interpolation nodes \(-1\leq x_{nn}< x_{n-1,n}< \cdots< x_{1n}\leq 1\). The fundamental polynomials \(A_{jk}(x)\) of degree at most \(mn-1\) satisfy the conditions \(A_{jk}^{(p)} (x_{qn})= \delta_{jp} \delta_{kq}\) for \(j,p= 0,\dots, m-1\) and \(k,q= 1,\dots, n\). As the main result of the paper, exact lower bounds for the quantities \(L_{jmn}:= \| \sum_{k=1}^ n | A_{jk}(x)| \|_ \infty\), \(j=0,\dots, m-1\), are established, namely \(L_{jmn}\geq c_ 1(\log n)/ n^ j\) if \(m-j\) is even, with \(c_ 1\) and \(c_ 2\) being positive constants depending only on \(j\) and \(m\). The Chebyshev nodes \(x_{kn}= \cos((2k-1) \pi/(2n))\) are used to show that these estimates are sharp.

Related Organizations
Keywords

Hermite interpolation polynomials, Approximation by polynomials, Chebyshev nodes, Interpolation in approximation theory

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
27
Average
Top 10%
Top 10%
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