Asymptotic isoperimetry on groups and uniform embeddings into Banach spaces

Details Asymptotic isoperimetry on groups and uniform embeddings into Banach spaces Asymptotic isoperimetry on groups and uniform embeddings into Banach spaces

2006-03-06

arxiv.org/abs/math/0603138v5

Mathematics

Group Theory

38 pages, modification: correct proof of the lower bound 2/3 of the compression of (Z \wr Z)

Scientific paper

We characterize the asymptotic behaviour of the compression associated to a uniform embedding into some Lp-space for a large class of groups including connected Lie groups with exponential growth and word-hyperbolic finitely generated groups. In particular, the Hilbert compression rate of these groups is equal to 1. This also provides new and optimal estimates for the compression of a uniform embedding of the infinite 3-regular tree into some Lp-space. The main part of the paper is devoted to the explicit construction of affine isometric actions of amenable Lie groups on Lp-spaces whose compressions are asymptotically optimal. These constructions are based on an asymptotic lower bound of the Lp-isoperimetric profile inside balls. We compute this profile for all amenable connected Lie groups and for all finite p, providing new geometric invariants of these groups. We also relate the Hilbert compression rate with other asymptotic quantities such as volume growth and probability of return of random walks.

Affiliated with

Also associated with

No associations

Rating

Asymptotic isoperimetry on groups and uniform embeddings into Banach spaces does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Asymptotic isoperimetry on groups and uniform embeddings into Banach spaces, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asymptotic isoperimetry on groups and uniform embeddings into Banach spaces will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-44638