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arxiv: 1009.0700 · v1 · pith:KH4OHLTBnew · submitted 2010-09-03 · 🧮 math.PR

Weak convergence of random walks conditioned to stay away

classification 🧮 math.PR
keywords mathbbrandomawayconditionedlimitstayweakbelkin
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Let $\{X_n\}_{n\in\mathbb{N}}$ be a sequence of i.i.d. random variables in $\mathbb{Z}^d$. Let $S_k=X_1+...+X_k$ and $Y_n(t)$ be the continuous process on $[0,1]$ for which $Y_n(k/n)=S_k/\sqrt{n}$ $k=1,...,n$ and which is linearly interpolated elsewhere. The paper gives a generalization of results of Belkin, \cite{B72} on the weak limit laws of $Y_n(t)$ conditioned to stay away from some small sets. In particular, it is shown that the diffusive limit of the random walk meander on $\mathbb Z^d: d\ge 2$ is the Brownian motion.

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