arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1203.2007math.PR
收藏

随机环境下接触过程的大偏差

Large deviations for the contact process in random environment

Olivier Garet, Régine Marchand

摘要:

随机环境中接触过程的渐近形状定理给出了$\Rd$上的范数$μ$的存在性,使得当接触过程生存时,首中时$t(x)$与$μ(x)$渐近等价.我们在这里提供事件$\{\frac{t(x)}{μ(x)}\not\in [1-ε,1+ε]\}$的概率的指数上界,这些界限是最佳的独立随机环境。作为一种特殊情况,这给出了确定性环境中接触过程的大偏差不等式,据我们所知,这一不等式尚未成立。

英文摘要:

The asymptotic shape theorem for the contact process in random environment gives the existence of a norm $μ$ on $\Rd$ such that the hitting time $t(x)$ is asymptotically equivalent to $μ(x)$ when the contact process survives. We provide here exponential upper bounds for the probability of the event $\{\frac{t(x)}{μ(x)}\not\in [1-ε,1+ε]\}$; these bounds are optimal for independent random environment. As a special case, this gives the large deviation inequality for the contact process in a deterministic environment, which, as far as we know, has not been established yet.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑