arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.08574math.CO
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关于$r$ -Shi和$r$ -Catalan安排的双射

Bijections on $r$-Shi and $r$-Catalan Arrangements

Houshan Fu, Suijie Wang, Weijin Zhu

摘要:

结合$\Bbb{R}^n$中的$r$ -Shi排列和$r$ -Catalan排列,我们在每个区域引入一个立方矩阵,以统一的方式建立两个双射。首先,三次矩阵的列切片中最小正元素的位置将给出从$r$ -Shi排列的区域到$O$ -根标记$r$ -树的双射.其次,三次矩阵的列切片中的正元素数将给出从$r$ -Catalan排列的区域到置换和$r$ -Dyck路径对的双射,并且三次矩阵的行切片中的正元素数将恢复Pak-Stanley标号,这是从$r$ -Shi排列的区域到$r$ -parking函数的著名双射.

英文摘要:

Associated with the $r$-Shi arrangement and $r$-Catalan arrangement in $\Bbb{R}^n$, we introduce a cubic matrix for each region to establish two bijections in a uniform way. Firstly, the positions of minimal positive entries in column slices of the cubic matrix will give a bijection from regions of the $r$-Shi arrangement to $O$-rooted labeled $r$-trees. Secondly, the numbers of positive entries in column slices of the cubic matrix will give a bijection from regions of the $r$-Catalan arrangement to pairings of permutation and $r$-Dyck path. Moreover, the numbers of positive entries in row slices of the cubic matrix will recover the Pak-Stanley labeling, a celebrated bijection from regions of the $r$-Shi arrangement to $r$-parking functions.

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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