{ "id": "1705.06725", "version": "v1", "published": "2017-05-18T17:52:49.000Z", "updated": "2017-05-18T17:52:49.000Z", "title": "Straightening warped cones", "authors": [ "Damian Sawicki", "Jianchao Wu" ], "comment": "17 pages", "categories": [ "math.MG", "math.DS", "math.GR" ], "abstract": "We provide converses to two results of J. Roe (Geom. Topol. 2005): first, the warped cone over a free action of a Haagerup group admits a fibred coarse embedding into a Hilbert space, and second, a free action yielding a warped cone with property A must be amenable. We construct examples showing that in both cases the freeness assumption is necessary. The first equivalence is obtained also for other classes of Banach spaces, e.g. for $L^p$-spaces.", "revisions": [ { "version": "v1", "updated": "2017-05-18T17:52:49.000Z" } ], "analyses": { "keywords": [ "straightening warped cones", "free action", "haagerup group admits", "first equivalence", "freeness assumption" ], "note": { "typesetting": "TeX", "pages": 17, "language": "en", "license": "arXiv", "status": "editable" } } }