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Proceedings of the American Mathematical Society

ISSN 1088-6826(online) ISSN 0002-9939(print)



The Hardy class of a Bazilevič function and its derivative

Author: Sanford S. Miller
Journal: Proc. Amer. Math. Soc. 30 (1971), 125-132
MSC: Primary 30.42
MathSciNet review: 0288246
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Abstract: The Bazilevič function $ f(z)$ defined in $ \Delta :\vert z\vert < 1$ by $ f(z) \equiv {[\alpha \smallint _0^zP(\zeta )g{(\zeta )^\alpha }{\zeta ^{ - 1}}d\zeta ]^{1/\alpha }}$ where $ g(\zeta )$ is starlike in $ \Delta $, $ P(\zeta )$ is regular with Re $ P(\zeta ) > 0$ in $ \Delta $ and $ \alpha > 0$ is univalent. The class of such functions contains many of the special classes of univalent functions. The author determines the Hardy classes to which $ f(z)$ and $ f'(z)$ belong. In addition if $ f(z) = \sum\nolimits_0^\infty {{a_n}{z^n}} $ the limiting value of $ \vert{a_n}\vert/n$ is obtained.

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Keywords: Univalent, Bazilevič functions, close-to-convex, Hardy class, coefficient growth condition, Cesaro summability
Article copyright: © Copyright 1971 American Mathematical Society

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