ON THE EMPTY BALLS OF A CRITICAL OR SUBCRITICAL BRANCHING RANDOM WALK*

ON THE EMPTY BALLS OF A CRITICAL OR SUBCRITICAL BRANCHING RANDOM WALK^*

ON THE EMPTY BALLS OF A CRITICAL OR SUBCRITICAL BRANCHING RANDOM WALK^*

ON THE EMPTY BALLS OF A CRITICAL OR SUBCRITICAL BRANCHING RANDOM WALK^*

ON THE EMPTY BALLS OF A CRITICAL OR SUBCRITICAL BRANCHING RANDOM WALK^*

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doi:10.1007/s10473-024-0525-0

数学物理学报(英文版) ›› 2024, Vol. 44 ›› Issue (5): 2051-2072.doi: 10.1007/s10473-024-0525-0

• • 上一篇

Shuxiong Zhang^1,†, Jie Xiong²

1. School of Mathematics and Statistics, Anhui Normal University, Wuhu 241002, China;
2. Department of Mathematics and SUSTech International Center for Mathematics, Southern University of Science and Technology, Shenzhen 518055, China

收稿日期:2022-05-09 修回日期:2024-05-21 出版日期:2024-10-25 发布日期:2024-10-22
通讯作者: †Shuxiong Zhang, E-mail,: shuxiong.zhang@mail.bnu.edu.cn
作者简介:Jie Xiong, E-mail,: xiongj@sustech.edu.cn
基金资助:
Jie Xiong's research was supported by the National Key R&D Program of China (2022YFA1006102).

Shuxiong Zhang^1,†, Jie Xiong²

1. School of Mathematics and Statistics, Anhui Normal University, Wuhu 241002, China;
2. Department of Mathematics and SUSTech International Center for Mathematics, Southern University of Science and Technology, Shenzhen 518055, China

Received:2022-05-09 Revised:2024-05-21 Online:2024-10-25 Published:2024-10-22
Contact: †Shuxiong Zhang, E-mail,: shuxiong.zhang@mail.bnu.edu.cn
About author:Jie Xiong, E-mail,: xiongj@sustech.edu.cn
Supported by:
Jie Xiong's research was supported by the National Key R&D Program of China (2022YFA1006102).

摘要： Let $\{Z_n\}_{n\geq 0 }$ be a critical or subcritical $d$ -dimensional branching random walk started from a Poisson random measure whose intensity measure is the Lebesugue measure on $\mathbb{R}^d$ . Denote by $R_n:=\sup\{u>0:Z_n(\{x\in\mathbb{R}^d:|x|<u\})=0\}$ the radius of the largest empty ball centered at the origin of $Z_n$ . In this work, we prove that after suitable renormalization, $R_n$ converges in law to some non-degenerate distribution as $n\to\infty$ . Furthermore, our work shows that the renormalization scales depend on the offspring law and the dimension of the branching random walk. This completes the results of Révész [13] for the critical binary branching Wiener process.

关键词: empty ball, dimension, branching random walk, super-Brownian motion

Abstract: Let $\{Z_n\}_{n\geq 0 }$ be a critical or subcritical $d$ -dimensional branching random walk started from a Poisson random measure whose intensity measure is the Lebesugue measure on $\mathbb{R}^d$ . Denote by $R_n:=\sup\{u>0:Z_n(\{x\in\mathbb{R}^d:|x|<u\})=0\}$ the radius of the largest empty ball centered at the origin of $Z_n$ . In this work, we prove that after suitable renormalization, $R_n$ converges in law to some non-degenerate distribution as $n\to\infty$ . Furthermore, our work shows that the renormalization scales depend on the offspring law and the dimension of the branching random walk. This completes the results of Révész [13] for the critical binary branching Wiener process.

Key words: empty ball, dimension, branching random walk, super-Brownian motion

中图分类号:

60J68

Shuxiong Zhang, Jie Xiong. ON THE EMPTY BALLS OF A CRITICAL OR SUBCRITICAL BRANCHING RANDOM WALK^*[J]. 数学物理学报(英文版), 2024, 44(5): 2051-2072.

Shuxiong Zhang, Jie Xiong. ON THE EMPTY BALLS OF A CRITICAL OR SUBCRITICAL BRANCHING RANDOM WALK^*[J]. Acta mathematica scientia,Series B, 2024, 44(5): 2051-2072.

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