Bi-concave Functions Defined by Al-Oboudi Differential Operator
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Abstract:
The purpose of the present paper is to introduce a class $D_{Sigma ;delta }^{n}C_{0}(alpha )$ of bi-concave functions defined by Al-Oboudi differential operator. We find estimates on the Taylor-Maclaurin coefficients $leftvert a_{2}rightvert $ and $leftvert a_{3}rightvert$ for functions in this class. Several consequences of these results are also pointed out in the form of corollaries.
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Journal title
volume 17 issue 1
pages 207- 217
publication date 2022-04
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