English

Generalized Erd\H{o}s-Rogers problems for hypergraphs

Combinatorics 2025-04-07 v1

Abstract

Given rr-uniform hypergraphs GG and FF and an integer nn, let fF,G(n)f_{F,G}(n) be the maximum mm such that every nn-vertex GG-free rr-graph has an FF-free induced subgraph on mm vertices. We show that fF,G(n)f_{F,G}(n) is polynomial in nn when GG is a subgraph of an iterated blowup of FF. As a partial converse, we show that if GG is not a subgraph of an FF-iterated blowup and is 22-tightly connected, then fF,G(n)f_{F,G}(n) is at most polylogarithmic in nn. Our bounds generalize previous results of Dudek and Mubayi for the case when FF and GG are complete.

Keywords

Cite

@article{arxiv.2504.03138,
  title  = {Generalized Erd\H{o}s-Rogers problems for hypergraphs},
  author = {Xiaoyu He and Jiaxi Nie},
  journal= {arXiv preprint arXiv:2504.03138},
  year   = {2025}
}

Comments

9 pages, 2 figures. Comments are welcome!

R2 v1 2026-06-28T22:46:10.486Z