Tuza's Conjecture is Asymptotically Tight for Dense Graphs
Tuza's Conjecture is Asymptotically Tight for Dense Graphs
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DOI:
10.1017/s0963548316000067
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发表时间:
2014-08
期刊:
影响因子:
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通讯作者:
Jacob D. Baron;J. Kahn
中科院分区:
文献类型:
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作者:
Jacob D. Baron;J. Kahn
An old conjecture of Z. Tuza says that for any graph G, the ratio of the minimum size, τ3(G), of a set of edges meeting all triangles to the maximum size, ν3(G), of an edge-disjoint triangle packing is at most 2. Here, disproving a conjecture of R. Yuster, we show that for any fixed, positive α there are arbitrarily large graphs G of positive density satisfying τ3(G) > (1 − o(1))|G|/2 and ν3(G) < (1 + α)|G|/4.