Sortable elements and Cambrian lattices
Sortable elements and Cambrian lattices
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可排序元素和寒武纪晶格
DOI:
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发表时间:
2005
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通讯作者:
Nathan Reading
中科院分区:
文献类型:
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作者:
Nathan Reading
Abstract.We show that the Coxeter-sortable elements in a finite Coxeter group W are the minimal congruence-class representatives of a lattice congruence of the weak order on W. We identify this congruence as the Cambrian congruence on W, so that the Cambrian lattice is the weak order on Coxeter-sortable elements. These results exhibit W-Catalan combinatorics arising in the context of the lattice theory of the weak order on W.