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A large deviation principle for the Erd\H{o}s-R\'enyi uniform random graph

Probability 2018-05-01 v1 Combinatorics

Abstract

Starting with the large deviation principle (LDP) for the Erd\H{o}s-R\'enyi binomial random graph G(n,p)\mathcal{G}(n,p) (edge indicators are i.i.d.), due to Chatterjee and Varadhan (2011), we derive the LDP for the uniform random graph G(n,m)\mathcal{G}(n,m) (the uniform distribution over graphs with nn vertices and mm edges), at suitable m=mnm=m_n. Applying the latter LDP we find that tail decays for subgraph counts in G(n,mn)\mathcal{G}(n,m_n) are controlled by variational problems, which up to a constant shift, coincide with those studied by Kenyon et al. and Radin et al. in the context of constrained random graphs, e.g., the edge/triangle model.

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Cite

@article{arxiv.1804.11327,
  title  = {A large deviation principle for the Erd\H{o}s-R\'enyi uniform random graph},
  author = {Amir Dembo and Eyal Lubetzky},
  journal= {arXiv preprint arXiv:1804.11327},
  year   = {2018}
}

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12 pages