On a graph packing conjecture by Bollobás, Eldridge and Catlin
On a graph packing conjecture by Bollobás, Eldridge and Catlin
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关于 Bollobás、Eldridge 和 Catlin 的图包装猜想
DOI:
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发表时间:
2008
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影响因子:
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通讯作者:
Gexin Yu
中科院分区:
文献类型:
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作者:
Hemanshu Kaul;A. Kostochka;Gexin Yu
Two graphs G1 and G2 of order n pack if there exist injective mappings of their vertex sets into [n], such that the images of the edge sets are disjoint. In 1978, Bollobás and Eldridge, and independently Catlin, conjectured that if (Δ(G1) + 1)(Δ(G2) + 1) ≤ n + 1, then G1 and G2 pack. Towards this conjecture, we show that for Δ(G1),Δ(G2) ≥ 300, if (Δ(G1) + 1)(Δ(G2) + 1) ≤ 0.6n + 1, then G1 and G2 pack. This is also an improvement, for large maximum degrees, over the classical result by Sauer and Spencer that G1 and G2 pack if Δ(G1)Δ(G2) < 0.5n.