English

How to get the random graph with non-uniform probabilities?

Combinatorics 2024-05-28 v1

Abstract

The Rado Graph, sometimes also known as the (countable) Random Graph, can be generated almost surely by putting an edge between any pair of vertices with some fixed probability p(0,1)p \in (0, 1), independently of other pairs. In this article, we study the influence of allowing different probabilities for each pair of vertices. More specifically, we characterize for which sequences (pn)nN(p_n)_{n\in \mathbb{N}} of values in [0,1][0, 1] there exists a bijection f from pairs of vertices in N\mathbb{N} to N\mathbb{N} such that if we put an edge between vv and ww with probability pf({v,w})p_{f(\{v,w\})}, independently of other pairs, then the Random Graph arises almost surely.

Keywords

Cite

@article{arxiv.2405.16142,
  title  = {How to get the random graph with non-uniform probabilities?},
  author = {Leonardo N. Coregliano and Jarosław Swaczyna and Agnieszka Widz},
  journal= {arXiv preprint arXiv:2405.16142},
  year   = {2024}
}
R2 v1 2026-06-28T16:40:01.466Z