Quasinormal Families of Meromorphic Functions

Quasinormal Families of Meromorphic Functions
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DOI:
10.1007/3-7643-7340-7_13
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发表时间:
2005-04
影响因子:
1.2
通讯作者:
X. Pang;Shahar Nevo;L. Zalcman
X. Pang;Shahar Nevo;L. Zalcman
中科院分区:
数学2区
文献类型:
--
作者:
X. Pang;Shahar Nevo;L. Zalcman

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设是D上的拟正规亚纯函数族,其零点都是重零点,设是D上的单叶全纯函数。设对任意f ∈ D,f′(z)∈ f ′(z),z ∈ D.则这是D上1阶拟正规的。此外,如果存在一个紧集K ∈ D,使得每个k ∈ D. 在K的两个不同点处为零,那么在D上是正规的。
Letbe a quasinormal family of meromorphic functions onD, all of whose zeros are multiple, and let ϕ be a holomorphic function univalent onD. Suppose that for anyf∊,f′(z) ≠ ϕ′(z) forz∊D. Thenis quasinormal of order 1 onD. Moreover, if there exists a compact setK⊂Dsuch that eachf∊. vanishes at two distinct points ofK, thenis normal onD.