{ "id": "0809.1701", "version": "v1", "published": "2008-09-10T03:08:21.000Z", "updated": "2008-09-10T03:08:21.000Z", "title": "Secant Varieties of (P ^1) X .... X (P ^1) (n-times) are NOT Defective for n \\geq 5", "authors": [ "M. V. Catalisano", "A. Geramita", "A. Gimigliano" ], "categories": [ "math.AG", "math.AC" ], "abstract": "Let V_n be the Segre embedding of (P^1) x ... X (P^1) (n times). We prove that the higher secant varieties, \\sigma_s(V_n), always have the expected dimension, except for \\sigma_3(V_4), which is of dimension 1 less than expected.", "revisions": [ { "version": "v1", "updated": "2008-09-10T03:08:21.000Z" } ], "analyses": { "subjects": [ "14N15", "14M99" ], "keywords": [ "higher secant varieties", "expected dimension" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2008arXiv0809.1701C" } } }