Nonintersection Exponents for Brownian Paths. II. Estimates and Applications to a Random Fractal

Nonintersection Exponents for Brownian Paths. II. Estimates and Applications to a Random Fractal
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布朗路径的非相交指数。

DOI:
10.1214/aop/1176990733
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发表时间:
1990
影响因子:
2.3
通讯作者:
G. Lawler
G. Lawler
中科院分区:
数学1区
文献类型:
--
作者:
K. Burdzy;G. Lawler

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令X和Y是独立的二维布朗运动,X(0)=(0,0),Y(0)=(e,0),令p(e)= P(X[0,1] ∩ Y[0,1] = O),q(e)= {Y[0,1]不包含围绕0的闭环}。给出了p(e),q(e)的渐近估计(当e → 0时)以及一些相关的概率。设F是R2/Z[0,1]的无界连通分支的边界,其中Z(t)= X(t)- tX(1),t ∈ [0,1].则F是一个闭Jordan弧,且F的Hausdorff维数小于或等于3/2 - 1/(4π 2)
Let X and Y be independent two-dimensional Brownian motions, X(0) = (0,0), Y(0) = (e,0), and let p(e) = P(X[0,1] ∩ Y[0,1] = O), q(e) = {Y[0,1] does not contain a closed loop around 0}. Asymptotic estimates (when e → 0) of p(e), q(e), and some related probabilities, are given. Let F be the boundary of the unbounded connected component of R 2 /Z[0,1], where Z(t) = X(t) - tX(1) for t ∈ [0,1]. Then F is a closed Jordan arc and the Hausdorff dimension of F is less or equal to 3/2 - 1/(4π 2 )