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arXiv 0812.1173math.RT
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Renner幺半群的表示

Representations of the Renner Monoid

Zhuo Li, Zhenheng Li, You'an Cao

摘要:

给出了Renner么半群对约化么半群的不可约表示和特征标公式,将车么半群的Munn-Solomon表示论推广到任何Renner么半群.与约化幺半群相关的类型映射和多面体在我们的工作中起着至关重要的作用。事实证明,外尔群的某些抛物子群的不可约表示决定了伦纳么半群的不可约表示的完备集。利用抛物子群的特征标,给出了计算Renner么半群特征标的Munn-Solomon公式的一个类似形式.

英文摘要:

We describe irreducible representations and character formulas of the Renner monoids for reductive monoids, which generalizes the Munn-Solomon representation theory of rook monoids to any Renner monoids. The type map and polytope associated with reductive monoids play a crucial role in our work. It turns out that the irreducible representations of certain parabolic subgroups of the Weyl groups determine the complete set of irreducible representations of the Renner monoids. An analogue of the Munn-Solomon formula for calculating the character of the Renner monoids, in terms of the characters of the parabolic subgroups, is shown.

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