Clusters, Coxeter-sortable elements and noncrossing partitions

Clusters, Coxeter-sortable elements and noncrossing partitions
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簇、Coxeter 可排序元素和非交叉分区

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发表时间:
2005
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通讯作者:
Nathan Reading
Nathan Reading
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作者:
Nathan Reading

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本文引入Coxeter群的Coxeter可排序元,给出了有限Coxeter可排序元与簇和不相交划分的个数相等的双射证明。我们用Coxeter可排序元素的逆集来刻画Coxeter可排序元素,在经典情形下,用置换来刻画Coxeter可排序元素
We introduce Coxeter-sortable elements of a Coxeter group For finite we give bijective proofs that Coxeter-sortable elements are equinumerous with clusters and with noncrossing partitions. We characterize Coxeter-sortable elements in terms of their inversion sets and, in the classical cases, in terms of permutations