{ "id": "1705.01652", "version": "v1", "published": "2017-05-03T23:19:56.000Z", "updated": "2017-05-03T23:19:56.000Z", "title": "Polluted Bootstrap Percolation with Threshold Two in All Dimensions", "authors": [ "Janko Gravner", "Alexander E. Holroyd" ], "categories": [ "math.PR", "math-ph", "math.MP" ], "abstract": "In the polluted bootstrap percolation model, the vertices of a graph are independently declared initially occupied with probability p or closed with probability q. At subsequent steps, a vertex becomes occupied if it is not closed and it has at least r occupied neighbors. On the cubic lattice Z^d of dimension d>=3 with threshold r=2, we prove that the final density of occupied sites converges to 1 as p and q both approach 0, regardless of their relative scaling. Our result partially resolves a conjecture of Morris, and contrasts with the d=2 case, where Gravner and McDonald proved that the critical parameter is q/{p^2}.", "revisions": [ { "version": "v1", "updated": "2017-05-03T23:19:56.000Z" } ], "analyses": { "subjects": [ "60K35", "82B43" ], "keywords": [ "polluted bootstrap percolation model", "subsequent steps", "cubic lattice", "probability", "final density" ], "note": { "typesetting": "TeX", "pages": 0, "language": "en", "license": "arXiv", "status": "editable" } } }