{ "id": "1701.04441", "version": "v1", "published": "2017-01-16T19:57:54.000Z", "updated": "2017-01-16T19:57:54.000Z", "title": "A Magnus theorem for some amalgamated products", "authors": [ "Carsten Feldkamp" ], "categories": [ "math.GR" ], "abstract": "A group $G$ possesses the Magnus property if for every two elements $u,v \\in G$ with the same normal closure, $u$ is conjugate in $G$ to $v$ or $v^{-1}$. We prove the Magnus property for some amalgamated products including the fundamental group of a closed non-orientable surface of genus 3. This answers a question of O. Bogopolski and K. Sviridov, who obtained the analogous result for genus $g > 3$.", "revisions": [ { "version": "v1", "updated": "2017-01-16T19:57:54.000Z" } ], "analyses": { "keywords": [ "amalgamated products", "magnus theorem", "magnus property", "normal closure", "fundamental group" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }