arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1106.4065math.GT
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完全图的规范书表示中的纽结

Knots in the canonical book representation of complete graphs

Andrea Politano, Dana Rowland

摘要:

我们描述了在n个顶点的完全图K_n的规范书表示中,哪些节点可以作为圈得到。我们证明了K_n的正则书表示包含一个复合纽结的哈密顿圈当且仅当n>11;当p和q互素时,(p,q)环面纽结是K_{2p+q}的正则书表示中的哈密顿圈.最后,我们列出了K_n(n<12)的规范书表示中作为循环出现的所有非平凡结的数量和类型。我们猜想K_n的正则书表示对于K_n的任何嵌入都能得到最少可能的纽结圈数。

英文摘要:

We describe which knots can be obtained as cycles in the canonical book representation of K_n, the complete graph on n vertices. We show that the canonical book representation of K_n contains a Hamiltonian cycle that is a composite knot if and only if n>11 and we show that when p and q are relatively prime, the (p,q) torus knot is a Hamiltonian cycle in the canonical book representation of K_{2p+q}. Finally, we list the number and type of all non-trivial knots that occur as cycles in the canonical book representation of K_n for n<12. We conjecture that the canonical book representation of K_n attains the least possible number of knotted cycles for any embedding of K_n.

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