Non-crossing partition lattices in finite real reflection groups
Non-crossing partition lattices in finite real reflection groups
复制标题
有限实反射群中的不交叉划分格子
DOI:
10.1090/s0002-9947-07-04282-1
复制
发表时间:
2007
影响因子:
1.3
通讯作者:
C. Watt
中科院分区:
文献类型:
--
作者:
T. Brady;C. Watt
For a finite real reflection group W with Coxeter element γ we give a case-free proof that the closed interval, [I,-γ], forms a lattice in the partial order on W induced by reflection length. Key to this is the construction of an isomorphic lattice of spherical simplicial complexes. We also prove that the greatest element in this latter lattice embeds in the type W simplicial generalised associahedron, and we use this fact to give a new proof that the geometric realisation of this associahedron is a sphere.