Freeness of multi-reflection arrangements via primitive vector fields
Freeness of multi-reflection arrangements via primitive vector fields
复制标题
通过原始向量场实现多重反射排列的自由度
DOI:
10.1016/j.aim.2019.04.044
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发表时间:
2019
影响因子:
1.7
通讯作者:
G. Röhrle
中科院分区:
文献类型:
--
作者:
Christian Stump;T. Hoge;T. Mano;G. Röhrle
In 2002, Terao showed that every reflection multi-arrangement of a real reflection group with constant multiplicity is free by providing a basis of the module of derivations. We first generalize Terao's result to multi-arrangements stemming from well-generated unitary reflection groups, where the multiplicity of a hyperplane depends on the order of its stabilizer. Here the exponents depend on the exponents of the dual reflection representation. We then extend our results further to all imprimitive irreducible unitary reflection groups. In this case the exponents turn out to depend on the exponents of a certain Galois twist of the dual reflection representation that comes from a Beynon-Lusztig type semi-palindromicity of the fake degrees.
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DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
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通讯作者:
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发表时间:
2005
期刊:
Proc. Amer. Math. Soc 133, no.7
影响因子:
--
作者:
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通讯作者:
Hiroaki