Extremal Problems on Δ-Systems
Extremal Problems on Δ-Systems
复制标题
Δ 系统的极端问题
DOI:
10.1007/978-1-4757-6048-4_14
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发表时间:
2000
期刊:
影响因子:
--
通讯作者:
A. Kostochka
中科院分区:
文献类型:
--
作者:
A. Kostochka
A family of sets is called a Δ-system (respectively, a weak Δ-system) if the intersection of any two sets is the same (respectively, the cardinality of the intersection of any two sets is the same). In 1960, P. Erdos and R. Rado started studying the maximum size of a k-uniform hypergraph not containing a Δ-system of a given size. The aim of the present article is to survey the progress and state of art in this and related problems.