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arXiv 2202.11641math.COcs.DM
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匹配理论与Barnette猜想

Matching Theory and Barnette's Conjecture

Maximilian Gorsky, Raphael Steiner, Sebastian Wiederrecht

摘要:

Barnette猜想认为所有三次3连通平面二部图都是Hamilton图。我们给这个猜想到匹配理论设置的翻译。这使得我们可以放松对平面性的要求,给出等价的猜想,即所有三次、3连通、普夫图、二部图都是哈密尔顿图。一个图,除了长度为3的路之外,如果它是二分的,并且任何两个不相交的边是完美匹配的一部分,则它是一个花括号。我们的观点使我们能够观察到,巴内特猜想可以减少到立方,平面括号。我们展示了一个类似的减少大括号三次,3-连通,二部图关于四个更强的版本的哈密顿。注意,在这些情况下,我们不需要平面性。作为这些结果的一个实际应用,我们对Holton等人[哈密顿圈在三次三连通二部可平面图中,JCTB,1985]中发现的三次三连通平面二部图的生成过程作了一些补充.这些允许我们检查我们生成的图是否是一个大括号。

英文摘要:

Barnette's Conjecture claims that all cubic, 3-connected, planar, bipartite graphs are Hamiltonian. We give a translation of this conjecture into the matching-theoretic setting. This allows us to relax the requirement of planarity to give the equivalent conjecture that all cubic, 3-connected, Pfaffian, bipartite graphs are Hamiltonian. A graph, other than the path of length three, is a brace if it is bipartite and any two disjoint edges are part of a perfect matching. Our perspective allows us to observe that Barnette's Conjecture can be reduced to cubic, planar braces. We show a similar reduction to braces for cubic, 3-connected, bipartite graphs regarding four stronger versions of Hamiltonicity. Note that in these cases we do not need planarity. As a practical application of these results, we provide some supplements to a generation procedure for cubic, 3-connected, planar, bipartite graphs discovered by Holton et al. [Hamiltonian Cycles in Cubic 3-Connected Bipartite Planar Graphs, JCTB, 1985]. These allow us to check whether a graph we generated is a brace.

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