Arrangements defined by unitary reflection groups

Arrangements defined by unitary reflection groups
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由单一反射组定义的排列

DOI:
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发表时间:
1982
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通讯作者:
Louis Solomon
Louis Solomon
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文献类型:
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作者:
P. Orlik;Louis Solomon

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令 V 为 I 维复向量空间。V 中的排列是超平面的有限集合 d,所有超平面都包含原点。令 L = L ( d ) 为 ~r 元素的交集。通过反向包含对 L 进行偏序,使得 L 将 V 作为其最小元素,将 d 作为其原子集。偏序集 L 是一个有限几何格,其秩函数 r(X)= dim V/X, XE L。不失一般性,我们假设 N H ~ , H =0 是 L 的最大元素,因此 L 具有秩 I。L 的特征多项式 z(L, t) 定义为
Let V be a complex vector space of dimension I. An arrangement in V is a finite set d of hyperplanes, all containing the origin. Let L = L ( d ) be the set of intersections of elements of ~r Partially order L by reverse inclusion so that L has V as its minimal element and d as its set of atoms. The poset L is a finite geometric lattice with rank function r(X)= dim V/X, XE L. Without loss of generality we assume that N H ~ , H =0 is the maximal element of L and thus L has rank I. The characteristic polynomial z(L, t) of L is defined by