Lipschitz functions on unions and quotients of metric spaces
Lipschitz functions on unions and quotients of metric spaces
复制标题
度量空间的并集和商的 Lipschitz 函数
DOI:
10.4064/sm230117-19-4
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发表时间:
2022
影响因子:
0.8
通讯作者:
C. Gartland
中科院分区:
文献类型:
--
作者:
D. Freeman;C. Gartland
Given a finite collection $\{X_i\}_{i\in I}$ of metric spaces, each of which has finite Nagata dimension and Lipschitz free space isomorphic to $L^1$, we prove that their union has Lipschitz free space isomorphic to $L^1$. The short proof we provide is based on the Pelczy\'nski decomposition method. A corollary is a solution to a question of Kaufmann about the union of two planar curves with tangential intersection. A second focus of the paper is on a special case of this result that can be studied using geometric methods. That is, we prove that the Lipschitz free space of a union of finitely many quasiconformal trees is isomorphic to $L^1$. These geometric methods also reveal that any metric quotient of a quasiconformal tree has Lipschitz free space isomorphic to $L^1$. Finally, we analyze Lipschitz light maps on unions and metric quotients of quasiconformal trees in order to prove that the Lipschitz dimension of any such union or quotient is equal to 1.
影响因子:
0.6
作者:
David, Guy C.
通讯作者:
David, Guy C.
影响因子:
1
作者:
David, Guy;Eriksson-Bique, Sylvester;Vellis, Vyron
通讯作者:
Vellis, Vyron
影响因子:
0.6
作者:
Bonk, Mario;Meyer, Daniel
通讯作者:
Meyer, Daniel