Cut Times for Simple Random Walk
Cut Times for Simple Random Walk
复制标题
缩短简单随机游走的时间
DOI:
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发表时间:
1996
期刊:
影响因子:
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通讯作者:
G. Lawler
中科院分区:
文献类型:
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作者:
G. Lawler
Let $S(n)$ be a simple random walk taking values in $Z^d$. A time $n$ is called a cut time if [ S[0,n] cap S[n+1,infty) = emptyset . ] We show that in three dimensions the number of cut times less than $n$ grows like $n^{1 - zeta}$ where $zeta = zeta_d$ is the intersection exponent. As part of the proof we show that in two or three dimensions [ P(S[0,n] cap S[n+1,2n] = emptyset ) sim n^{-zeta}, ] where $sim$ denotes that each side is bounded by a constant times the other side.