Volterra type integral operator and analytic function spaces

Fuente: arXiv
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Autor principal: Kargar, Rahim
Formato: Preprint
Publicado: 2018
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author Kargar, Rahim
author_facet Kargar, Rahim
contents We investigate the geometric properties of the Volterra-type integral operator \begin{equation*} T_g[f](z) = \int_{0}^{z} f(s)\, g'(s)\, ds, \quad |z|<1, \end{equation*} acting on various subclasses of analytic functions in the unit disk. Sharp estimates are obtained for the convexity radius of $T_g$, which simultaneously determine its univalence radius, across several classical function families. In addition, we introduce and study higher-order Volterra-type operators, establish their normalized forms, and propose an open question on the scaling behavior of their convexity radii.
format Preprint
id arxiv_https___arxiv_org_abs_1805_01043
institution arXiv
publishDate 2018
record_format arxiv
spellingShingle Volterra type integral operator and analytic function spaces
Kargar, Rahim
Complex Variables
47B38, 30C45
We investigate the geometric properties of the Volterra-type integral operator \begin{equation*} T_g[f](z) = \int_{0}^{z} f(s)\, g'(s)\, ds, \quad |z|<1, \end{equation*} acting on various subclasses of analytic functions in the unit disk. Sharp estimates are obtained for the convexity radius of $T_g$, which simultaneously determine its univalence radius, across several classical function families. In addition, we introduce and study higher-order Volterra-type operators, establish their normalized forms, and propose an open question on the scaling behavior of their convexity radii.
title Volterra type integral operator and analytic function spaces
topic Complex Variables
47B38, 30C45
url https://arxiv.org/abs/1805.01043