| The Inner Radius of Univalency of the Rhom busDom ain |
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| 作者姓名： | 郑学良 |
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| 作者单位： | Department of Mathematics，Zhejiang Taizhou Teachers College，317000 |
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| 摘 要： | §１． ＩｎｔｒｏｄｕｃｔｉｏｎａｎｄＮａｒｒａｔａｔｉｏｎｏｆｔｈｅＴｈｅｏｒｅｍＩｆｆｕｎｃｔｉｏｎｆｉｓａｎａｌｙｔｉｃｉｎｄｏｍａｉｎＤａｎｄｆ′（ｚ）≠０ａｔｐｏｉｎｔｚ，ｗｅｄｅｆｉｎｅｔｈｅｓｃｈｗａｒｚｉａｎｄｅｒｉｖａｔｉｖｅｏｆｆａｓＳｆ（ｚ）＝（ｆ″（ｚ）ｆ′（ｚ））′－１２（ｆ″（ｚ）ｆ′（ｚ））２．（１．１） Ｆｏｒａｌｏｃａｌｌｙｕｎｉｖａｌｅｎｔｈｏｌｏｍｏｒｐｈｉｃｆｕｎｃｔｉｏｎ，ｉｔｓＳｃｈｗａｒｚｉａｎｄｅｒｉｖａｔｉｖｅｉｓｃｌｅａｒ．Ａｔｐｏｌｅｓ，ｔ…
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| 关 键 词： | 菱形区域 单叶性内径 SChwArz导数 |
The Inner Radius of Univalency of the Rhombus Domain |
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| Zheng Xueliang.The Inner Radius of Univalency of the Rhom busDom ain[J].Chinese Quarterly Journal of Mathematics,1998,13(4):29-32. |
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| Authors: | Zheng Xueliang |
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| Abstract: | The inner radius of univalency of a domain is greater than zero if and only if the domain is a quasidisc. However,little is known about the value of the inner radius of univalency for various quasidiscs. In this paper,we will use the comparison principal and obtain the value of the inner radius of univalency of the rhombus domain. |
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| Keywords: | Schwarzian derivative inner radius of univalency |
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