The F-triangle of the Generalised Cluster Complex

The F-triangle of the Generalised Cluster Complex
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广义簇复合体的 F 三角形

DOI:
10.1007/3-540-33700-8_6
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发表时间:
2005
期刊:
arXiv: Combinatorics
影响因子:
--
通讯作者:
C. Krattenthaler
C. Krattenthaler
中科院分区:
--
文献类型:
--
作者:
C. Krattenthaler

文献摘要

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f -三角形是对Fomin和Reading的广义集群复合体的改进面计数。我们明确地计算了所有不可约有限根的f三角形。此外,我们利用这些结果部分证明了Armstrong的“F = m猜想”,该猜想预测了有限根系统下的可分剖偏集的F三角形与Möbius函数之间的惊人关系。
TheF-triangle is a refined face count for the generalised cluster complex of Fomin and Reading. We compute theF-triangle explicitly for all irreducible finite root systems. Furthermore, we use these results to partially prove the “F = MConjecture” of Armstrong which predicts a surprising relation between theF-triangle and the Möbius function of hism-divisible partition poset associated to a finite root system.