{ "id": "1302.1451", "version": "v2", "published": "2013-02-06T17:48:39.000Z", "updated": "2013-04-02T22:26:17.000Z", "title": "Spans of special cycles of codimension less than 5", "authors": [ "Martin Raum" ], "comment": "18 pages", "categories": [ "math.NT", "math.AG" ], "abstract": "We show that the span of special cycles in the $r$th Chow group of a Shimura variety of orthogonal type is finite dimensional, if $r < 5$. As our main tool, we develop the theory of Jacobi forms with rational index $M \\in \\Mat{N}(\\QQ)$.", "revisions": [ { "version": "v2", "updated": "2013-04-02T22:26:17.000Z" } ], "analyses": { "subjects": [ "14C15", "11F50", "11F30" ], "keywords": [ "special cycles", "codimension", "th chow group", "orthogonal type", "jacobi forms" ], "note": { "typesetting": "TeX", "pages": 18, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2013arXiv1302.1451R" } } }