Weighted multiply intersecting families
Weighted multiply intersecting families
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加权相交族
DOI:
10.1556/sscmath.40.2003.3.2
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发表时间:
2003
影响因子:
0.7
通讯作者:
N. Tokushige
中科院分区:
文献类型:
--
作者:
P. Frankl;N. Tokushige
Let n and r be positive integers. Suppose that a family F ⊂ 2[n] satisfies F1 ∩ · · · ∩ Fr 6= ∅ for all F1, . . . , Fr ∈ F . We prove that if 0 < w ≤ (r − 1)/r then ∑ F∈F w |F |(1− w)n−|F | ≤ w.