Geometric series of positive linear operators and the inverse Voronovskaya theorem on a compact interval

We define the associated geometric series for a large class of positive linear operators and study the convergence of the series in the case of sequences of admissible operators. We obtain an inverse Voronovskaya theorem and we apply our results to the Bernstein operators and a class of Bernstein–Du...

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Bibliographic Details
Published in:Journal of approximation theory Vol. 184; pp. 163 - 175
Main Authors: Abel, Ulrich, Ivan, Mircea, Păltănea, Radu
Format: Journal Article
Language:English
Published: Elsevier Inc 01.08.2014
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ISSN:0021-9045, 1096-0430
Online Access:Get full text
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Summary:We define the associated geometric series for a large class of positive linear operators and study the convergence of the series in the case of sequences of admissible operators. We obtain an inverse Voronovskaya theorem and we apply our results to the Bernstein operators and a class of Bernstein–Durrmeyer type operators.
ISSN:0021-9045
1096-0430
DOI:10.1016/j.jat.2014.05.011