The Maximal Length of a Gap between $r$-Graph Turán Densities

[摘要] The Turán density $\pi(\cal F)$ of a family $\cal F$ of $r$-graphs is the limit as $n\to\infty$ of the maximum edge density of an $\cal F$-free $r$-graph on $n$ vertices. Erdős [Israel J. Math, 2 (1964):183—190] proved that no Turán density can lie in the

[学科分类] 离散数学和组合数学

[关键词] Hypergraphs;Turán function