English

Making $K_{r+1}$-Free Graphs $r$-partite

Combinatorics 2022-05-03 v1

Abstract

The Erd\H{o}s-Simonovits stability theorem states that for all \epsilon >0 there exists \alpha >0 such that if G is a K_{r+1}-free graph on n vertices with e(G) > ex(n,K_{r+1}) - \alpha n^2, then one can remove \epsilon n^2 edges from G to obtain an r-partite graph. F\"uredi gave a short proof that one can choose \alpha=\epsilon. We give a bound for the relationship of \alpha and \varepsilon which is asymptotically sharp as \epsilon \to 0.

Keywords

Cite

@article{arxiv.1910.00028,
  title  = {Making $K_{r+1}$-Free Graphs $r$-partite},
  author = {József Balogh and Felix Christian Clemen and Mikhail Lavrov and Bernard Lidický and Florian Pfender},
  journal= {arXiv preprint arXiv:1910.00028},
  year   = {2022}
}

Comments

12 pages, 1 figure

R2 v1 2026-06-23T11:30:41.786Z