The number of hypergraphs without linear cycles
The number of hypergraphs without linear cycles
复制标题
没有线性循环的超图的数量
DOI:
10.1016/j.jctb.2018.07.003
复制
发表时间:
2017
期刊:
影响因子:
--
通讯作者:
J. Skokan
中科院分区:
文献类型:
--
作者:
J. Balogh;Bhargav P. Narayanan;J. Skokan
The r-uniform linear k-cycle C k r is the r-uniform hypergraph on k (r− 1) vertices whose edges are sets of r consecutive vertices in a cyclic ordering of the vertex set chosen in such a way that every pair of consecutive edges share exactly one vertex. Here, we prove a balanced supersaturation result for linear cycles which we then use in conjunction with the method of hypergraph containers to show that for any fixed pair of integers r, k≥ 3, the number of C k r-free r-uniform hypergraphs on n vertices is 2 Θ (n r− 1), thereby settling a conjecture due to Mubayi and Wang from 2017.
影响因子:
0.9
作者:
J. Balogh;Lina Li
通讯作者:
J. Balogh;Lina Li