arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0910.4416math.PR
收藏

一维长程扩散限制聚集

One-dimensional long-range diffusion-limited aggregation I

Gideon Amir, Omer Angel, Itai Benjamini, Gady Kozma

摘要:

我们研究扩散限制聚集产生的随机游动Z上的长跳跃。我们推导出上界和下界的增长率作为一个函数的数量时刻的一个单一的步骤的步行。在阶跃分布尾部的各种规律性条件下,我们证明了直径随着n^{beta+o(1)}而增长,其中β显式给定。当行走步具有有限的三阶矩、有限的方差和有限的半阶矩时,聚集体的增长率存在三个相变。

英文摘要:

We examine diffusion-limited aggregation generated by a random walk on Z with long jumps. We derive upper and lower bounds on the growth rate of the aggregate as a function of the number moments a single step of the walk has. Under various regularity conditions on the tail of the step distribution, we prove that the diameter grows as n^{beta+o(1)}, with an explicitly given beta. The growth rate of the aggregate is shown to have three phase transitions, when the walk steps have finite third moment, finite variance, and, conjecturally, finite half moment.

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。

↑