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arXiv 1003.5875math.COmath.RT
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等变Ehrhart理论

Equivariant Ehrhart theory

Alan Stapledon

摘要:

受表示论和几何学的启发,我们引入并发展了Ehrhart理论的一个等变推广,即研究格多面体膨胀中的格点。我们证明了许多经典结果的表示理论的类似物,并给出合理的多面体和中心对称多面体的Ehrhart理论的应用。我们还恢复了Procesi,Dolgachev,Lunts和Stembridge关于外尔群对与根系相关的环面簇的上同调的作用的特征标公式.

英文摘要:

Motivated by representation theory and geometry, we introduce and develop an equivariant generalization of Ehrhart theory, the study of lattice points in dilations of lattice polytopes. We prove representation-theoretic analogues of numerous classical results, and give applications to the Ehrhart theory of rational polytopes and centrally symmetric polytopes. We also recover a character formula of Procesi, Dolgachev, Lunts and Stembridge for the action of a Weyl group on the cohomology of a toric variety associated to a root system.

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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