The Alexander transform of a spirallike function

The Alexander transform of a spirallike function
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DOI:
10.1016/j.jmaa.2006.01.077
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发表时间:
2007
影响因子:
1.3
通讯作者:
Yong Chan Kim;T. Sugawa
Yong Chan Kim;T. Sugawa
中科院分区:
数学3区
文献类型:
--
作者:
Yong Chan Kim;T. Sugawa

文献摘要

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证明了当cosβ ≠ 1/2时,β-螺形函数的亚历山大变换是单叶的,从而解决了Robertson提出的问题.我们还解决了Y. J. Kim和Merkes考虑的一个问题。
We show that the Alexander transform of a β-spirallike function is univalent when cosβ⩽1/2, which settles the problem posed by Robertson. We also solved a problem considered by Y.J. Kim and Merkes.