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arXiv 0705.0426math.GR
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Coxeter群的反射子群

Reflection subgroups of Coxeter groups

Anna Felikson, Pavel Tumarkin

摘要:

利用Coxeter群的Davis复形几何证明了如下结果:若G是无限不可分解Coxeter群,$H\subset G$是有限指数反射子群,则H的秩不小于G的秩.这概括了math/0305093的结果。我们还描述了在等秩情况下群和子群的神经的一些性质。

英文摘要:

We use geometry of Davis complex of a Coxeter group to prove the following result: if G is an infinite indecomposable Coxeter group and $H\subset G$ is a finite index reflection subgroup then the rank of H is not less than the rank of G. This generalizes results of math/0305093. We also describe some properties of the nerves of the group and the subgroup in the case of equal ranks.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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