Meromorphic Functions on Annuli Sharing Few Small Functions with Truncated Multiplicities

Authors: Trần An Hải, Hà Hương Giang, Sĩ Đức Quang,

https://doi.org/10.1007/s11785-018-0808-3

Publisher, magazine: ,

Publication year: 2019

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Abstract

In this paper, we show that two admissible meromorphic functions on an annulus must coincide to each other if they share q (q≥5) distinct small functions regardless of multiplicity. We also show that such two meromorphic functions must be linked by a quasi-Möbius transformation if they share four distinct small functions with multiplicities truncated by a certain level. Moreover, in our result, all intersection points of such meromorphic functions with small functions do not need to be counted if their multiplicities are bigger than a certain number.

Tags: Meromorphic function ,Nevanlinna theory ,The annulus