Weighted Yosida functions

被引:3
作者
Aulaskari, R. [1 ]
Makhmutov, S. [2 ,3 ]
Rattya, J. [1 ]
机构
[1] Univ Joensuu, Dept Math & Phys, FIN-80101 Joensuu, Finland
[2] Sultan Qaboos Univ, Coll Sci, Dept Math & Stat, Muscat 123, Oman
[3] Ufa State Aviat Tech Univ, Ufa 450025, Russia
关键词
spherical derivative; Yosida function; 5-point theorem; algebraic differential equation;
D O I
10.1080/17476930902998969
中图分类号
O1 [数学];
学科分类号
0701 ; 070101 ;
摘要
We study meromorphic functions on the complex plane with given growth of the spherical derivative. We find a criterion of Lohwater-Pommerenke type for non-weighted Yosida functions, and apply this result to obtain a version of Lappan's 5-point theorem. Further, a necessary condition for all solutions of algebraic differential equation of nth order to be weighted Yosida functions is found.
引用
收藏
页码:167 / 172
页数:6
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