English

Metric compactifications and coarse structures

General Topology 2019-08-15 v3 Metric Geometry

Abstract

Let TB\mathbf{TB} be the category of totally bounded, locally compact metric spaces with the C0C_0 coarse structures. We show that if XX and YY are in TB\mathbf{TB} then XX and YY are coarsely equivalent if and only if their Higson coronas are homeomorphic. In fact, the Higson corona functor gives an equivalence of categories TBK\mathbf{TB}\to\mathbf{K}, where K\mathbf{K} is the category of compact metrizable spaces. We use this fact to show that the continuously controlled coarse structure on a locally compact space XX induced by some metrizable compactification X~\tilde{X} is determined only by the topology of the remainder X~X\tilde{X}\setminus X.

Keywords

Cite

@article{arxiv.1106.1672,
  title  = {Metric compactifications and coarse structures},
  author = {Kotaro Mine and Atsushi Yamashita},
  journal= {arXiv preprint arXiv:1106.1672},
  year   = {2019}
}

Comments

16 pages. v3: Corrected typos. v2: Title changed from "$C_0$ coarse structures and Smirnov compactifications". Considerable improvements in the proofs of the main theorem (Theorem 4.5) and an important lemma (Lemma 3.7). New results in the final section (Theorem 4.12 among others)

R2 v1 2026-06-21T18:19:40.901Z