English

Competition on $\mathbb{Z}^d$ driven by branching random walk

Probability 2022-03-29 v1

Abstract

A competition process on Zd\mathbb{Z}^d is considered, where two species compete to color the sites. The entities are driven by branching random walks. Specifically red (blue) particles reproduce in discrete time and place offspring according to a given reproduction law, which may be different for the two types. When a red (blue) particle is placed at a site that has not been occupied by any particle before, the site is colored red (blue) and keeps this color forever. The types interact in that, when a particle is placed at a site of opposite color, the particle adopts the color of the site with probability p[0,1]p\in[0,1]. Can a given type color infinitely many sites? Can both types color infinitely many sites simultaneously? Partial answers are given to these questions and many open problems are formulated.

Keywords

Cite

@article{arxiv.2203.14166,
  title  = {Competition on $\mathbb{Z}^d$ driven by branching random walk},
  author = {Maria Deijfen and Timo Vilkas},
  journal= {arXiv preprint arXiv:2203.14166},
  year   = {2022}
}
R2 v1 2026-06-24T10:27:06.652Z