{ "id": "math/9712212", "version": "v2", "published": "1997-12-02T16:03:23.000Z", "updated": "1998-09-07T00:00:00.000Z", "title": "The symmetry of intersection numbers in group theory", "authors": [ "Peter Scott" ], "comment": "19 pages. Published copy, also available at http://www.maths.warwick.ac.uk/gt/GTVol2/paper2.abs.html . Includes erratum added to the original, published 19 Mar 1998", "journal": "Geom. Topol. 2 (1998), 11-29", "categories": [ "math.GT", "math.GR" ], "abstract": "For suitable subgroups of a finitely generated group, we define the intersection number of one subgroup with another subgroup and show that this number is symmetric. We also give an interpretation of this number.", "revisions": [ { "version": "v2", "updated": "1998-09-07T00:00:00.000Z" } ], "analyses": { "subjects": [ "20F32", "20E06", "20E07", "20E08", "57M07" ], "keywords": [ "intersection number", "group theory", "suitable subgroups" ], "tags": [ "journal article" ], "note": { "typesetting": "TeX", "pages": 19, "language": "en", "license": "arXiv", "status": "editable" } } }