{ "id": "0807.0839", "version": "v2", "published": "2008-07-05T02:47:39.000Z", "updated": "2008-07-13T08:16:59.000Z", "title": "On a Lower Bound for the Time Constant of First-Passage Percolation", "authors": [ "Xian-Yuan Wu", "Ping Feng" ], "comment": "7 pages", "categories": [ "math.PR", "math-ph", "math.MP" ], "abstract": "We consider the Bernoulli first-passage percolation on $\\mathbb Z^d (d\\ge 2)$. That is, the edge passage time is taken independently to be 1 with probability $1-p$ and 0 otherwise. Let ${\\mu(p)}$ be the time constant. We prove in this paper that \\[ \\mu(p_1)-\\mu({p_2})\\ge \\frac{\\mu(p_2)}{1-p_2}(p_2-p_1)\\] for all $ 0\\leq p_1