On Uniqueness of Meromorphic Functions and Their Derivatives in One Angular Domain
Received:September 20, 2007  Revised:March 10, 2008
Key Word: uniqueness of meromorphic function   derivative functions   angular domain.  
Fund ProjectL:the National Natural Science Foundation of China (No.10471048); the Natural Science Foundation of Xianning College (No.BK0714) and the Natural Science Foundation of Hubei Educational Committee (No.2009B2809).
Author NameAffiliation
WU Zhao Jun Department of Mathematics, Xianning University, Hubei 437100, China 
SUN Dao Chun School of Mathematics, South China Normal University, Guangzhou 510631, China 
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      In this paper, applying the Nevanlinna theory of meromorphic function in one angular domain, we deal with a problem of uniqueness for meromorphic functions and their derivatives sharing three finite value ignoring multiplicities in an angular domain instead of the whole complex plane. Obtained results improve a recent result of Lin Weichuan and Seiki Mori.
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