Geometric and approximation properties of a complex Post–Widder operator in the unit disk |
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| Institution: | 1. Department of Mathematical Sciences, The University of Memphis, Memphis, TN 38152, USA;2. Department of Mathematics, University of Oradea, Str. Armatei Romane 5, 410087 Oradea, Romania |
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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. |
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