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Geometric and approximation properties of a complex Post-Widder operator in the unit disk

Applied Mathematics Letters (2006) 19(4) 314-319
DOI: 10.1016/j.aml.2005.04.012
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Abstract

The purpose of this work is to obtain Jackson-type estimates in approximation by a complex Post-Widder operator in the unit disk. In addition, these operators preserve some sufficient conditions for starlikeness and univalence of analytic functions. © 2005 Elsevier Ltd. All rights reserved.

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Anastassiou, G. A., & Gal, S. G. (2006). Geometric and approximation properties of a complex Post-Widder operator in the unit disk. Applied Mathematics Letters, 19(4), 314–319. https://doi.org/10.1016/j.aml.2005.04.012

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