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Two meromorphic functions on annuli sharing some pairs of values
Authors:Duc Quang Si  An Hai Tran
Affiliation:1. Department of Mathematics, Hanoi National University of Education, 136-Xuan Thuy - Cau Giay - Hanoi, Viet Nam;2. Division of Mathematics, Banking Academy, 12-Chua Boc, Dong Da, Hanoi, Viet Nam
Abstract:In this article, we prove that two admissible meromorphic functions f and g on an annulus must be linked by a Möbius transformation if they share a pair of values ignoring multiplicities and share other four pairs of values with multiplicities truncated by 2. We also show that two admissible meromorphic functions which share q(q6) pairs of values ignoring multiplicities are linked by a Möbius transformation. Moreover, in our results, the zeros with multiplicities more than a certain number are not needed to be counted in the sharing pairs of values condition of meromorphic functions.
Keywords:Nevanlinna  Meromorphic function  Sharing values  Möbius transformation
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