Hypergraphs in which all disjoint pairs have distinct unions
Hypergraphs in which all disjoint pairs have distinct unions
复制标题
所有不相交对都有不同并集的超图
DOI:
10.1007/bf02579216
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发表时间:
1984
期刊:
影响因子:
1.1
通讯作者:
Z. Füredi
中科院分区:
文献类型:
--
作者:
Z. Füredi
AbstractLet ℓ be a set-system ofr-element subsets on ann-element set,r≧3. It is proved that if |ℓ|>3.5
$$\left( {\begin{array}{*{20}c} n \\ {r - 1} \\ \end{array} } \right)$$
then ℓ contains four distinct membersA, B, C, D such thatA∪B=C∪D andA∩B=C∩D=0.