On uniqueness polynomials for meromorphic functions

On uniqueness polynomials for meromorphic functions
复制标题

DOI:
10.1017/s0027763000008527
复制
发表时间:
2003
影响因子:
0.8
通讯作者:
H. Fujimoto
H. Fujimoto
中科院分区:
数学2区
文献类型:
--
作者:
H. Fujimoto

文献摘要

被引文献

相似文献

一个多项式P(w)称为唯一性多项式(或广义唯一性多项式),如果P(f)= cP(g)(或P(f)= P(g))对C上的任意非零常数c和非常数亚纯函数f和g蕴涵f = g。我们考虑一个没有重零点的一元多项式P(w),它的导数有相互不同的k个零点ej,重数为qj。在假设对于所有不同的l和m,P(el)≠ P(em)的情况下,我们证明了P(w)是广义上的唯一性多项式当且仅当∑l ∑ l ql。我们也给出了多项式唯一性的一些充分条件。
Abstract A polynomial P(w) is called a uniqueness polynomial (or a uiqueness polynomial in a broad sense) if P(f) = cP(g) (or P(f) = P(g)) implies f = g for any nonzero constant c and nonconstant meromorphic functions f and g on C. We consider a monic polynomial P(w) without multiple zero whose derivative has mutually distinct k zeros ej with multiplicities qj. Under the assumption that P(el) ≠ P(em) for all distinct l and m, we prove that P(w) is a uniqueness polynomial in a broad sense if and only if ∑l ∑ l ql. We also give some sufficient conditions for uniqueness polynomials.