Every locally finite Borel measure on $\mathbb{R}$ has conformal dimension zero
Tuomas Orponen
Abstract
Open-access reader
Tuomas Orponen
Abstract
Open-access reader
A result of P. Tukia from 1989 says that Lebesgue measure on $\mathbb{R}$ has conformal dimension zero: for every $ε> 0$, there is a Borel set $G \subset \mathbb{R}$ of full Lebesgue measure, and a quasisymmetric homeomorphism $f \colon \mathbb{R} \to \mathbb{R}$ such that $\dim_{\mathrm{H}} f(G) < ε$. In this short note, I show that the same is true for every locally finite Borel measure on $\mathbb{R}$.
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A result of P. Tukia from 1989 says that Lebesgue measure on $\mathbb{R}$ has conformal dimension zero: for every $ε> 0$, there is a Borel set $G \subset \mathbb{R}$ of full Lebesgue measure, and a quasisymmetric homeomorphism $f \colon \mathbb{R} \to \mathbb{R}$ such that $\dim_{\mathrm{H}} f(G) < ε$. In this short note, I show that the same is true for every locally finite Borel measure on $\mathbb{R}$.
Key concepts: Lebesgue measure, Borel measure, Measure (data warehouse), Zero (linguistics), Dimension (graph theory), Borel set, Mathematics, Null set