Univalence of alexander transform under new mapping properties
作者:
S. Ponnusamy,
期刊:
Complex Variables, Theory and Application: An International Journal
(Taylor Available online 1996)
卷期:
Volume 30,
issue 1
页码: 55-58
ISSN:0278-1077
年代: 1996
DOI:10.1080/17476939608814911
出版商: Gordon and Breach Science Publishers
关键词: 30C45
数据来源: Taylor
摘要:
Let2F1(a,b;c;z) and Φ(a;c;z) denote the Gaussian hypergeometric function and confluent hypergeometric function respectively. It is well known that iffis univalent in the unit disc δ then the corresponding Alexander transform off, namelydt, is not necessarily univalent in the whole of δ In this paper we determine conditions on the parametersa,bandcso that the Alexander transform, wheref(z)=z2F1(a,b;c;z) or zΦ(a;c;z) is univalent and starlike in the whole of δ. In particular, we obtain conditions ona,b,cto guarantee that2F1(a,b;c;z) (and Φ(a;c;z) resp.) will be univalent in the whole of the unit disc.
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