{ "id": "2202.04911", "version": "v1", "published": "2022-02-10T09:07:43.000Z", "updated": "2022-02-10T09:07:43.000Z", "title": "The group of quasi-isometries of the real line cannot act effectively on the line", "authors": [ "Shengkui Ye", "Yanxin Zhao" ], "categories": [ "math.GT", "math.DS", "math.GR" ], "abstract": "We prove that the group $\\mathrm{QI}^{+}(\\mathbb{R})$ of orientation-preserving quasi-isometries of the real line is a left-orderable, non-simple group, which cannot act effectively on the real line $\\mathbb{R}.$", "revisions": [ { "version": "v1", "updated": "2022-02-10T09:07:43.000Z" } ], "analyses": { "keywords": [ "real line", "non-simple group" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }