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arXiv math/0511076math.CV
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正级星形函数逆的系数估计

Coefficient Estimates for Inverses of Starlike Functions of Positive Order

G. P. Kapoor, A. K. Mishra

摘要:

本文给出了由$\mathcal D=\{z\in\mathbb C:|z|<1\}$中的$α$级单叶星形函数类中的函数的逆构成的函数类$\mathcal S^{*-1}(α)$的系数估计.这些估计扩展了{ \it Krzyz,Libera and Zlotkiewicz [Ann. Univ. Marie Curie-Sklodowska,33(1979),103-109]}的工作,他们发现$\mathcal S^{*-1}(α)$类中的函数仅对前两个系数有尖锐的估计。系数估计也发现类$\sum^{*-1}(α)$,包括逆类$\sum^*(α)$的函数的单叶星形功能的顺序$α$在$\mathcal V=\{z\in\mathbb C:1<|z|<\infty\}$。公开的问题,发现尖锐的系数估计类$\sum^*(α)$的功能完全解决在目前的工作,我们的方法在这里开发。

英文摘要:

In the present paper, the coefficient estimates are found for the class $\mathcal S^{*-1}(α)$ consisting of inverses of functions in the class of univalent starlike functions of order $α$ in $\mathcal D=\{z\in\mathbb C:|z|<1\}$. These estimates extend the work of {\it Krzyz, Libera and Zlotkiewicz [Ann. Univ. Marie Curie-Sklodowska, 33(1979), 103-109]} who found sharp estimates on only first two coefficients for the functions in the class $\mathcal S^{*-1}(α)$. The coefficient estimates are also found for the class $\sum^{*-1}(α)$, consisting of inverses of functions in the class $\sum^*(α)$ of univalent starlike functions of order $α$ in $\mathcal V=\{z\in\mathbb C:1<|z|<\infty\}$. The open problem of finding sharp coefficient estimates for functions in the class $\sum^*(α)$ stands completely settled in the present work by our method developed here.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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