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arXiv 1601.05073math.CO
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无环无平行弦弦图的Enumeration

Enumeration of Chord Diagrams without Loops and Parallel Chords

Evgeniy Krasko, Alexander Omelchenko

摘要:

我们列举没有循环和没有循环和平行和弦的和弦图。我们表明,前者描述了$n$维八面体的哈密顿路径。后者也被称为形状。对于标号图,我们得到生成函数,对于未标号图,我们得到递归关系。

英文摘要:

We enumerate chord diagrams without loops and without both loops and parallel chords. We show that the former ones describe Hamiltonian paths in $n$-dimensional octahedrons. The latter ones are also known as shapes. For labelled diagrams we obtain generating functions, for unlabelled ones we derive recurrence relations.

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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