English

Asymptotics of visibility in the hyperbolic plane

Probability 2011-01-17 v2

Abstract

At each point of a Poisson point process of intensity λ\lambda in the hyperbolic place, center a ball of bounded random radius. Consider the probability PrP_r that from a fixed point, there is some direction in which one can reach distance rr without hitting any ball. It is known \cite{BJST} that if λ\lambda is strictly smaller than a critical intensity λgv\lambda_{gv} then PrP_r does not go to 00 as rr\to \infty. The main result in this note shows that in the case λ=λgv\lambda=\lambda_{gv}, the probability of reaching distance larger than rr decays essentially polynomial, while if λ>λgv\lambda>\lambda_{gv}, the decay is exponential. We also extend these results to various related models.

Keywords

Cite

@article{arxiv.1012.5220,
  title  = {Asymptotics of visibility in the hyperbolic plane},
  author = {Pierre Calka and Johan Tykesson},
  journal= {arXiv preprint arXiv:1012.5220},
  year   = {2011}
}

Comments

17 pages, preliminary version. Version 2: minor corrections and a minor structural change

R2 v1 2026-06-21T17:03:37.377Z