English

Generalized Ramsey-Tur\'an Numbers

Combinatorics 2024-05-15 v2

Abstract

The Ramsey-Tur\'an problem for KpK_p asks for the maximum number of edges in an nn-vertex KpK_p-free graph with independence number o(n)o(n). In a natural generalization of the problem, cliques larger than the edge K2K_2 are counted. Let {\bf RT}(n,#Kq,Kp,o(n))(n,\#K_q,K_p,o(n)) denote the maximum number of copies of KqK_q in an nn-vertex KpK_p-free graph with independence number o(n)o(n). Balogh, Liu and Sharifzadeh determined the asymptotics of {\bf RT}(n,#K3,Kp,o(n))(n,\# K_3,K_p,o(n)). In this paper we will establish the asymptotics for counting copies of K4K_4, K5K_5, and for the case p5qp \geq 5q. We also provide a family of counterexamples to a conjecture of Balogh, Liu and Sharifzadeh.

Keywords

Cite

@article{arxiv.2405.01804,
  title  = {Generalized Ramsey-Tur\'an Numbers},
  author = {József Balogh and Van Magnan and Cory Palmer},
  journal= {arXiv preprint arXiv:2405.01804},
  year   = {2024}
}

Comments

Fixed an icorrect row in Table 1 and corresponding computation in proof of Theorem 1.5

R2 v1 2026-06-28T16:15:01.738Z