English

Rainbow Tur\'an problems for a matching and any other graph

Combinatorics 2025-05-21 v1

Abstract

For a family of graphs \cF\cF, a graph is called \cF\cF-free if it does not contain any member of \cF\cF as a subgraph. Given a collection of graphs (G1,,Gt)(G_1,\ldots,G_t) on the same vertex set VV of size nn, a rainbow graph on VV is obtained by taking at most one edge from each GiG_i. We say that a collection is rainbow \cF\cF-free if it contains no rainbow copy of any member of \cF\cF. In this paper, we study the maximum values of mini[t]E(Gi)min_{i\in [t]}|E(G_i)|, i=1tE(Gi)\sum_{i=1}^{t}|E(G_i)| and i=1tE(Gi)\prod_{i=1}^{t}|E(G_i)| among rainbow {F,Ms+1}\{F,M_{s+1}\}-free collections (G1,,Gt)(G_1,\ldots,G_t) on nn vertices.

Keywords

Cite

@article{arxiv.2505.14386,
  title  = {Rainbow Tur\'an problems for a matching and any other graph},
  author = {Dániel Gerbner and Shujing Miao},
  journal= {arXiv preprint arXiv:2505.14386},
  year   = {2025}
}
R2 v1 2026-07-01T02:25:10.945Z