Strong embeddability and extensions of groups
Metric Geometry
2013-11-11 v3 Group Theory
Abstract
We introduce the notion of strong embeddability for a metric space. This property lies between coarse embeddability and property A. A relative version of strong embeddability is developed in terms of a family of set maps on the metric space. When restricted to discrete groups, this yields relative coarse embeddability. We verify that groups acting on a metric space which is strongly embeddable has this relative strong embeddability, provided the stabilizer subgroups do. As a corollary, strong embeddability is preserved under group extensions.
Cite
@article{arxiv.1307.1935,
title = {Strong embeddability and extensions of groups},
author = {Ronghui Ji and Crichton Ogle and Bobby Ramsey},
journal= {arXiv preprint arXiv:1307.1935},
year = {2013}
}