{ "id": "1108.6069", "version": "v1", "published": "2011-08-30T20:13:44.000Z", "updated": "2011-08-30T20:13:44.000Z", "title": "Why is the Class Number of $\\Q(\\sqrt[3]{11})$ even?", "authors": [ "Franz Lemmermeyer" ], "categories": [ "math.NT" ], "abstract": "In this article we will describe a surprising observation that occurred in the construction of quadratic unramified extensions of a family of pure cubic number fields. Attempting to find an explanation will lead us on a magical mystery tour through the land of pure cubic number fields, Hilbert class fields, and elliptic curves.", "revisions": [ { "version": "v1", "updated": "2011-08-30T20:13:44.000Z" } ], "analyses": { "keywords": [ "class number", "pure cubic number fields", "hilbert class fields", "elliptic curves", "quadratic unramified extensions" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2011arXiv1108.6069L" } } }