Volume 31 • Number 1 • 2008   • On Uniqueness of Meromorphic Functions with Shared Four Values in Some Angular Domains Junfeng Xu and Hongxun Yi Abstract. In this paper, we prove the uniqueness of meromorphic functions with shared four values in some angular domains. Our results consider the cases of the finite order and infinite order which improved the theorem of J.H. Zheng. 2000 Mathematics Subject Classification: 30D35. Full text: PDF