Note on Independent Sets in Steiner Systems
Note on Independent Sets in Steiner Systems
复制标题
关于 Steiner 系统中独立集的注释
DOI:
10.1002/rsa.3240050117
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发表时间:
1994
期刊:
影响因子:
--
通讯作者:
Edita Sinajová
中科院分区:
文献类型:
--
作者:
V. Rödl;Edita Sinajová
A partial Steiner (n, k, l)-system or briefly (n, k, l)-system is a pair (V, S), where V is an n-set and S is a collection of k-subsets of V, such that every l-subset of V is contained in at most one k-subset of S. A subset X ⊂ V is called independent if [X]k ∩ S = 0. The size of the largest independent set in S is denoted by α(S). Define
The purpose of this note is to prove that for every k, l, k > l
holds, where c, d are positive constants depending on k and l only.