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arXiv 1009.3603math.PR
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变漂移布朗运动的孤立零点

Isolated zeros for Brownian motion with variable drift

Tonći Antunović, Krzysztof Burdzy, Yuval Peres, Julia Ruscher

摘要:

众所周知,标准一维布朗运动B(t)几乎必然没有孤立零点.我们证明了对于任意α <1/2,存在α-Hölder连续函数f,使得过程B-f具有正概率的孤立零点。证明了对任意连续函数f,B-f的零点集的豪斯多夫维数至少为1/2且概率为正,且当f是1/2-Hölder连续或有界变差时,1/2是其上界.

英文摘要:

It is well known that standard one-dimensional Brownian motion B(t) has no isolated zeros almost surely. We show that for any alpha<1/2 there are alpha-Hölder continuous functions f for which the process B-f has isolated zeros with positive probability. We also prove that for any continuous function f, the zero set of B-f has Hausdorff dimension at least 1/2 with positive probability, and 1/2 is an upper bound if f is 1/2-Hölder continuous or of bounded variation.

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。

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