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arxiv: 1807.00473 · v1 · submitted 2018-07-02 · 🧮 math.CO

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On the vertex cover number of 3 uniform hypergraph

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classification 🧮 math.CO
keywords vertexcoverhypergraphnumbereveryholdsuniformcardinality
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Given a hypergraph H(V;E), a set of vertices S in V is a vertex cover if every edge has at least a vertex in S. The vertex cover number is the minimum cardinality of a vertex cover, denoted by t(H). In this paper, we prove that for every 3 uniform connected hypergraph H(V;E), t(H)<=(2m+1)/3 holds on where m is the number of edges. Furthermore, the equality holds on if and only if H(V;E) is a hypertree with perfect matching.

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