English

A local limit theorem for the edge counts of random induced subgraphs of a random graph

Combinatorics 2025-04-01 v1 Probability

Abstract

Consider a `dense' Erd\H{o}s--R\'enyi random graph model G=Gn,MG=G_{n,M} with nn vertices and MM edges, where we assume the edge density M/(n2)M/\binom{n}{2} is bounded away from 0 and 1. Fix k=k(n)k=k(n) with k/nk/n bounded away from 0 and~1, and let SS be a random subset of size kk of the vertices of GG. We show that with probability 1exp(nΩ(1))1-\exp(-n^{\Omega(1)}), GG satisfies both a central limit theorem and a local limit theorem for the empirical distribution of the edge count e(G[S])e(G[S]) of the subgraph of GG induced by SS, where the distribution is over uniform random choices of the kk-set SS.

Keywords

Cite

@article{arxiv.2503.23164,
  title  = {A local limit theorem for the edge counts of random induced subgraphs of a random graph},
  author = {Paul Balister and Emil Powierski and Alex Scott and Jane Tan},
  journal= {arXiv preprint arXiv:2503.23164},
  year   = {2025}
}

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25 pages