Regions of variability for convex functions

被引:20
作者
Yanagihara, Hiroshi [1 ]
机构
[1] Yamaguchi Univ, Fac Engn, Dept Appl Sci, Ube, Yamaguchi 7558611, Japan
关键词
convex; variability; region; starlike;
D O I
10.1002/mana.200310449
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
Let C be the class of convex univalent functions f in the unit disc D normalized by f (0) = f'(0) - 1 = 0. For z(0) is an element of D and vertical bar lambda vertical bar <= 1 we shall determine explicitly the regions of variability {log f'(z(0)) : f is an element of C, f" (0) = 2 lambda}. (c) 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
引用
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页码:1723 / 1730
页数:8
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