We prove that for every ε ∈ (0,1) there exists Cε ∈ (0,∞) with the following property. If (X,d) is a compact metric space and μ is a Borel probability measure on X then there exists a compact subset S X that embeds into an ultrametric space with distortion O(1/ε), and a probability measure ν supported on S satisfying ν(B d(x,r))≤(μ(Bd(x,Cεr)) 1-ε for all x ∈ X and r ∈ (0,∞). The dependence of the distortion on ε is sharp. We discuss an extension of this statement to multiple measures, as well as how it implies Talagrand's majorizing measure theorem.
|Number of pages||7|
|Journal||Proceedings of the National Academy of Sciences of the United States of America|
|State||Published - 26 Nov 2013|
- Bi-Lipschitz embeddings
- Majorizing measures
- Metric geometry
All Science Journal Classification (ASJC) codes