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On the capacity of singularity sets admitting no exceptionally ramified meromorphic functions

机译:关于奇点集的容量,不包含任何分枝的亚纯函数

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For a totally disconnected compact set E in the extended z-plane C, we denote by M_E the totality of meromorphic functions each of which is defined in the domain complementary to E and has E as the set of transcendental singularities. A meromorphic function f(z) of M_E is said to be exceptionally ramified at a singularity ζ ∈E, if there exist values w_i, 1≦ i ≦ q, and positive integers ν_i ≧ 2, 1 ≦ i≦ q, with ∑ form i=1 to q of (1-1/(ν_i)) > 2 such that, in some neighborhood of ζ, the multiplicity of any w_i-point of f(z) is not less than ν_i. Recently, we have shown that, for Cantor sets E with successive ratios {ξ_n} satisfying ξ_(n+1)=0(ξ_n~2), any function of M_E cannot be exceptionally ramified at any singularity ζ∈E(Theorem in [5]).
机译:对于扩展的z平面C中完全断开的紧集E,我们用M_E表示亚纯函数的总和,每个亚纯函数在与E互补的域中定义,并具有E作为先验奇点集。如果存在值w_i,1≦i≦q,并且正整数ν_i≦2,1≦i≦q,∑形式,M_E的亚纯函数f(z)被奇异地以ζ∈E分叉。 i = 1至(1-1 /(ν_i))> 2的q,使得在ζ的某个邻域中,f(z)的任何w_i点的多重性不小于ν_i。最近,我们表明,对于连续比{ξ_n}满足ξ_(n + 1)= 0(ξ_n〜2)的Cantor集E,在任何奇点ζ∈E([ 5])。

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