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arXiv 1812.00533math.CO
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车位的图论

A Graph Theory of Rook Placements

Kenneth Barrese

摘要:

如果两个棋盘的非攻击车的位置相同,那么它们是车等价的。定义一个费勒斯板的等价集的车等价图,如果你可以通过将另一个板中的方块从一列移到另一列来获得其中一个板,那么通过指定两个板由一条边连接。给定这样一个图,我们对哪些电路板将产生连通图进行分类。我们还提供了一些情况下,共同的图将或将不会是一些车等效费勒斯板集的图。最后,我们扩展这个图的定义,$m$级车放置推广布里格斯和Remmel。这会产生一个图上的车等价单例板的集合,我们的特点,单例板产生一个连通图。

英文摘要:

Two boards are rook equivalent if they have the same number of non-attacking rook placements for any number of rooks. Define a rook equivalence graph of an equivalence set of Ferrers boards by specifying that two boards are connected by an edge if you can obtain one of the boards by moving squares in the other board out of one column and into a singe other column. Given such a graph, we categorize which boards will yield connected graphs. We also provide some cases where common graphs will or will not be the graph for some set of rook equivalent Ferrers boards. Finally, we extend this graph definition to the $m$-level rook placement generalization developed by Briggs and Remmel. This yields a graph on the set of rook equivalent singleton boards, and we characterize which singleton boards give rise to a connected graph.

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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