| AN IMPROVEMENT ON ESTIMATE OF d_0/d~* FOR STARLIKE FUNCTIONS |
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| 引用本文： | 陈跃庆. AN IMPROVEMENT ON ESTIMATE OF d_0/d~* FOR STARLIKE FUNCTIONS[J]. 系统科学与复杂性, 1989, 0(4) |
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| 作者姓名： | 陈跃庆 |
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| 作者单位： | Huaqiao University |
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| 摘 要： | Let S~* be the class of starlike functions in unit disc.For f∈S~*,denote its radiusof convexity by r_0 and let d_0=(?)|f(z)|,d~*=inf{|β||f(z)≠β,|z|<1}.In this paper weprove d_0/d~*≥0.45,thus improving the result of d_0/d~*≥0.38 by McCarty,C.P.and Tepper,D.E.and d_0/d~*≥0.41 by Huang Xinzhong.
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AN IMPROVEMENT ON ESTIMATE OF d_0/d~* FOR STARLIKE FUNCTIONS |
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| Chen Yueqing. AN IMPROVEMENT ON ESTIMATE OF d_0/d~* FOR STARLIKE FUNCTIONS[J]. Journal of Systems Science and Complexity, 1989, 0(4) |
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| Authors: | Chen Yueqing |
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| Abstract: | |
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| Keywords: | Starlike function radius of convexity 2/3 conjecture |
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