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On a result of ostrowski*

 

作者: James A. Jenkins,   Kôtaro Oikawa,  

 

期刊: Complex Variables, Theory and Application: An International Journal  （Taylor Available online 1986）
卷期: Volume 5, issue 2-4  

页码: 155-163

 

ISSN:0278-1077

 

年代: 1986

 

DOI:10.1080/17476938608814136

 

出版商: Gordon and Breach Science Publishers

 

关键词: 30D40

 

数据来源: Taylor

 

摘要:

A new proof by the method of module (method of extremal length) is given for the following result of Ostrowski: If a univalent function one<Rez,|Imz|<π/2 is semi-conformal atz=+x, thenasu→+x. Our method reveals that the conclusion holds for some quasiconformal maps.

 

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