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具有两个分担值集的亚纯函数
Meromorphic functions sharing two sets
【摘要】 研究了亚纯函数的惟一性问题,在将分担值集的有关条件减为较弱的情况下,证明了下述结论:如果存在一个具有12个元素的复数集合S,使得对任意两个非常数的亚纯函数f和g,只要满足E—({∞},f)=E—({∞},g)和E—k)(S,f)=E—k)(S,g),其中k≥3,则必有f≡g.这一结论改进了仪洪勋和吕巍然的结论.假设S是一个具有13个元素的集合,若对任意的两个非常数亚纯函数f和g,只要满足E—({∞},f)=E—({∞},g)和E—(S,f)=E—(S,g),则必有f≡g.
【Abstract】 The problem of uniqueness of meromorphic functions is dealt with and the following result is achieved:there exists a set S such that any two non-constant meromorphic functions f and g satisfying E({∞},f)=E—({∞},g) and Ek)(S,f)=Ek)(S,g),where k≥3,must be identical.This result improves the Yi and Lü’s result.Let S be a set with 13 elements,if f and g are two non-constant meromorphic functions satisfying E({∞},f)=E({∞},g) and E(S,f)=E(S,g),then f≡g.
【关键词】 亚纯函数;
分担值集;
分担值;
惟一性定理;
【Key words】 meromorphic function; shared set; shared value; uniqueness thoerem;
【Key words】 meromorphic function; shared set; shared value; uniqueness thoerem;
- 【文献出处】 上海理工大学学报 ,Journal of University of Shanghai for Science and Technology , 编辑部邮箱 ,2006年05期
- 【分类号】O174.52
- 【被引频次】1
- 【下载频次】57