First-order Schwartian derivative and some classes of univalent functions
classification
🧮 math.CV
keywords
fracclassesderivativefunctionsleftrightschwartianunivalent
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In this paper we give estimate of $|S'_{f}(0)|$, where $S_{f}(z)= \left(\frac{f''(z)}{f'(z)}\right)'-\frac{1}{2}\left(\frac{f''(z)}{f'(z)}\right)^{2}$ is the Schwartian derivative, and $f$ belongs to different classes of functions univalent in the open unit disc $\ID$.
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