UNIQUENESS RESULTS OF MEROMORPHIC FUNCTIONS WHOSE DERIVATIVES SHARE FOUR SMALL FUNCTIONS

作者：Li Xiaomin^*; Yi Hongxun; Hu Haiyan

来源：Acta Mathematica Scientia, 2012, 32(4): 1593-1606.

• Nevanlinna theory
• meromorphic function
• shared value
• uniqueness
• order of growth

We prove an oscillation theorem of two meromorphic functions whose derivatives share four values IM. From this we obtain some uniqueness theorems, which improve the corresponding results given by Yang [16] and Qiu [10], and supplement results given by Nevanlinna [9] and Gundersen [3, 4]. Some examples are provided to show that the results in this paper are best possible.

• 出版日期2012-7
• 单位山东大学; 中国海洋大学