On Normal Subgroups of Coxeter Groups Generated by Standard Parabolic Subgroups
On Normal Subgroups of Coxeter Groups Generated by Standard Parabolic Subgroups
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关于标准抛物型子群生成的 Coxeter 群的正规子群
DOI:
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发表时间:
2005
期刊:
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通讯作者:
S. Gal
中科院分区:
文献类型:
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作者:
S. Gal
We discuss one construction of nonstandard subgroups in the category of Coxeter groups. Two formulae for the growth series of such a subgroups are given.As an application we construct a flag simple convex polytope, whose f-polynomial has non-real roots.