{ "id": "0910.0267", "version": "v4", "published": "2009-10-02T16:50:31.000Z", "updated": "2010-01-06T17:32:31.000Z", "title": "On normal subgroups of an amalgamated product of groups with applications to knot theory", "authors": [ "John G. Ratcliffe" ], "comment": "Some new references have been added to v3", "categories": [ "math.GR", "math.GT" ], "abstract": "In this paper, we give some necessary and sufficient conditions for a normal subgroup of an amalgamated product of groups to be finitely generated. We apply these conditions together with Stallings' fibering theorem to prove that an irreducible multilink in a homology 3-sphere fibers if and only if each of its multilink splice components fibers.", "revisions": [ { "version": "v4", "updated": "2010-01-06T17:32:31.000Z" } ], "analyses": { "subjects": [ "20E06", "57M25" ], "keywords": [ "normal subgroup", "amalgamated product", "knot theory", "applications", "multilink splice components fibers" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2009arXiv0910.0267R" } } }