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Minimum Number of Monochromatic Subgraphs of a Random Graph

Combinatorics 2026-02-04 v1 Probability

Abstract

We consider the problem of minimizing the number of monochromatic subgraphs of a random graph, when each node of the host graph is assigned one of the two colors. Using a recently discovered contiguity between appearance of strictly balanced subgraphs FF in a random graph, and random hypergraphs where copies of FF are generated independently, we show that the minimum value converges to a limit, when the expected number of copies of FF is linear in the number of nodes V|V|. Furthermore, using the connections with mean field spin glass models, we obtain an asymptotic expression for this limit as the normalized expected number of copies of FF and the size of FF diverge to infinity.

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Cite

@article{arxiv.2602.03774,
  title  = {Minimum Number of Monochromatic Subgraphs of a Random Graph},
  author = {Yatin Dandi and David Gamarnik and Haodong Zhu},
  journal= {arXiv preprint arXiv:2602.03774},
  year   = {2026}
}

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19 pages