A finite set covering theorem II
A finite set covering theorem II
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有限集覆盖定理 II
DOI:
10.1017/s000497270004421x
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发表时间:
1972
影响因子:
0.7
通讯作者:
D. E. Daykin
中科院分区:
文献类型:
--
作者:
A. Brace;D. E. Daykin
Let n, s, t be integers with s > t > 1 and n > (t+2)2s–t–1. We prove that if n subsets of a set S with s elements have intersection I and union J then some t of them have intersection J and union J. The result is best possible.