{ "id": "1808.10321", "version": "v1", "published": "2018-08-30T14:45:18.000Z", "updated": "2018-08-30T14:45:18.000Z", "title": "Niemeier lattices, smooth 4-manifolds and instantons", "authors": [ "Christopher Scaduto" ], "comment": "17 pages, 8 figures. Comments welcome!", "categories": [ "math.GT", "math.DG" ], "abstract": "We show that the set of even positive definite lattices that arise from smooth, simply-connected 4-manifolds bounded by a fixed homology 3-sphere can depend on more than the ranks of the lattices. We provide two homology 3-spheres with distinct sets of such lattices, each containing a distinct nonempty subset of the rank 24 Niemeier lattices.", "revisions": [ { "version": "v1", "updated": "2018-08-30T14:45:18.000Z" } ], "analyses": { "subjects": [ "57R57", "57M27" ], "keywords": [ "niemeier lattices", "instantons", "distinct nonempty subset", "positive definite lattices", "distinct sets" ], "note": { "typesetting": "TeX", "pages": 17, "language": "en", "license": "arXiv", "status": "editable" } } }