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arXiv 1806.02178math.CO
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奇阶凸几何图中简单Hamilton路的Blockers

Blockers for simple Hamiltonian paths in convex geometric graphs of odd order

Chaya Keller, Micha A. Perles

摘要:

设G是一个完全凸几何图,F是G的一族子图。F的一个阻断子是一组可能最小的边,它与F的每个元素都有一条共同的边。在[C. Keller和M. A. Perles,偶阶凸几何图中简单Hamilton路径的阻塞器,Disc。Comput. Geom.,60(1)(2018),pp. 1-8]我们给出了简单家族的所有阻断剂的明确描述(即,非交叉)Hamilton路(SHP)在G中的“偶”情况|V(G)|=2m。原来,所有的障碍物都是某一类简单的毛虫树。在本文中,我们给出了一个明确的描述所有阻滞剂的家庭的SHP在'奇'的情况下|V(G)|=2m-1。在这种情况下,阻断剂的结构更复杂,特别是,它们不一定简单。相应地,证明也更加复杂。

英文摘要:

Let G be a complete convex geometric graph, and let F be a family of subgraphs of G. A blocker for F is a set of edges, of smallest possible size, that has an edge in common with every element of F. In [C. Keller and M. A. Perles, Blockers for simple Hamiltonian paths in convex geometric graphs of even order, Disc. Comput. Geom., 60(1) (2018), pp. 1-8] we gave an explicit description of all blockers for the family of simple (i.e., non-crossing) Hamiltonian paths (SHPs) in G in the `even' case |V(G)|=2m. It turned out that all the blockers are simple caterpillar trees of a certain class. In this paper we give an explicit description of all blockers for the family of SHPs in the `odd' case |V(G)|=2m-1. In this case, the structure of the blockers is more complex, and in particular, they are not necessarily simple. Correspondingly, the proof is more complicated.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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