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 数学进展
 研究论文
 On a Theorem of Drasin On a Theorem of Drasin 陈怀惠,方明亮 Chen Huaihui Fang Mingliang Nanjing Normal University,Nanjing Normal University (Nanjing Normal University 收稿日期: 1991-12-25 出版日期: 1991-10-15
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 摘要  D. Drasin in 1969 proved that a family of holomorphic functions is normal ifevery function in the family satisfies f' - af~3≠b, where a and b are two complexnumbers and a≠0. Now, we obtain two improvements of this criterion. Theorem 1 A family {f} of holomorphic functions is normal if every functionin {f} satisfies
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