On the maximum number of r-cliques in graphs free of complete r-partite subgraphs

József Balogh, Suyun Jiang, Haoran Luo

Research output: Contribution to journalArticlepeer-review

Abstract

We estimate the maximum possible number of cliques of size r in an n-vertex graph free of a fixed complete r-partite graph Ks1,s2,…,sr. By viewing every r-clique as a hyperedge, the upper bound on the Turán number of the complete r-partite hypergraphs gives the upper bound O(nr−1/∏i=1r−1si). We improve this to o(nr−1/∏i=1r−1si). The main tool in our proof is the graph removal lemma. We also provide several lower bound constructions.

Original languageEnglish (US)
Article number114508
JournalDiscrete Mathematics
Volume348
Issue number8
DOIs
StatePublished - Aug 2025

Keywords

  • Complete graphs
  • Complete multi-partite graphs
  • Generalized Turán problem
  • Graph removal lemma

ASJC Scopus subject areas

  • Theoretical Computer Science
  • Discrete Mathematics and Combinatorics

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