On the lambda function and a quantification of torhorst theorem
On the lambda function and a quantification of torhorst theorem
复制标题
关于 lambda 函数和托霍斯特定理的量化
DOI:
10.1016/j.topol.2022.108245
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发表时间:
2020-02
期刊:
影响因子:
--
通讯作者:
Xiao-Ting Yao
中科院分区:
文献类型:
--
作者:
Li Feng;Jun Luo;Xiao-Ting Yao
For any compact K ⊂ C ˆ we define a map λ K : C ˆ → N ∪ { ∞ } , called the lambda function of K . The lambda function of a continuum K has the property that λ K ( x ) = 0 for all x ∈ C ˆ if and only if K is locally connected. We establish several inequalities and a gluing lemma for the lambda functions. These inequalities reflect the relationship between the topology of K and the complexity that may be involved in the boundary of a component of C ˆ ∖ K . One of them, called the lambda inequality, generalizes and quantifies the Torhorst Theorem. We also find three sufficient conditions under each of which the lambda inequality becomes an equality. These results cover Whyburn's Theorem on the partial converse to the Torhorst Theorem. The gluing lemma for the lambda functions is of research interest in the study of point set topology and of polynomial Julia sets as well.
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影响因子:
1.1
作者:
Clinton P. Curry
通讯作者:
Clinton P. Curry
影响因子:
0.8
作者:
Marie Torhorst
通讯作者:
Marie Torhorst
DOI:
10.1090/s0002-9939-2012-11607-7
发表时间:
2010-09
期刊:
arXiv: General Topology
影响因子:
--
作者:
A. Blokh;Clinton P. Curry;L. Oversteegen
通讯作者:
A. Blokh;Clinton P. Curry;L. Oversteegen
DOI:
10.1112/blms/bdn061
发表时间:
2003-09
期刊:
arXiv: General Topology
影响因子:
--
作者:
Lasse Rempe-Gillen
通讯作者:
Lasse Rempe-Gillen
DOI:
10.1007/978-3-662-02770-7
发表时间:
1992-08
期刊:
--
影响因子:
--
作者:
C. Pommerenke
通讯作者:
C. Pommerenke