The smallest 3-uniform bi-hypergraphs which are one-realization of a given set
The smallest 3-uniform bi-hypergraphs which are one-realization of a given set
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发表时间:
2011-11
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通讯作者:
P. Zhao;Kefeng Diao;Kaishun Wang
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作者:
P. Zhao;Kefeng Diao;Kaishun Wang
For any set $S$ of positive integers, a mixed hypergraph ${\cal H}$ is a one-realization of $S$ if its feasible set is $S$ and each entry of its chromatic spectrum is either 0 or 1. In this paper, we determine the minimum size of 3-uniform bi-hypergraphs which are one-realizations of a given set $S$. As a result, we partially solve an open problem proposed by Bujt$\acute{\rm a}$s and Tuza in 2008.