Remarks concerning linear characters of reflection groups
Remarks concerning linear characters of reflection groups
复制标题
关于反射群线性特征的备注
DOI:
10.1090/s0002-9939-05-07869-x
复制
发表时间:
2005
期刊:
影响因子:
--
通讯作者:
G. Lehrer
中科院分区:
文献类型:
--
作者:
G. Lehrer
Let G be a finite group generated by unitary reflections in a Hermitian space V, and let ζ be a root of unity. Let E be a subspace of V, maximal with respect to the property of being a ζ-eigenspace of an element of G, and let C be the parabolic subgroup of elements fixing E pointwise. If X is any linear character of G, we give a condition for the restriction of \ to C to be trivial in terms of the invariant theory of G, and give a formula for the polynomial Σ x ∈ G X (x) T d(x,ζ) , where d (x,ζ) is the dimension of the ζ-eigenspace of x. Applications include criteria for regularity, and new connections between the invariant, theory and the structure of G.