环面簇上同调的置换表示
Permutation Representations on Cohomology of Toric Varieties
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中文总结 AI 辅助
本文证明Stanley关于环面簇上同调表示是否为置换表示的开放问题,对所有光滑射影环面簇均成立,无需适当性假设,证明受环面镜像对称启发。
中文摘要 AI 辅助
设$G$是一个有限群,通过格自同构适当地作用在完备单纯扇$\Sigma$上。Stanley提出的一个开放问题询问:关联环面簇$X_{\Sigma}$的上同调$H^*(X_{\Sigma})$所承载的(未分次的)表示是否同构于$G$的一个置换表示。我们证明,对于所有光滑射影环面簇,Stanley的问题都有肯定答案,且无需对作用施加适当性假设。证明受环面镜像对称启发。
英文摘要
Let $G$ be a finite group acting properly by lattice automorphisms on a complete simplicial fan $Σ$. An open question due to Stanley asked whether the (ungraded) representation carried by the cohomology $H^*(X_Σ)$ of the associated toric variety $X_Σ$ is isomorphic to a permutation representation of $G$. We prove that Stanley's question has an affirmative answer for all smooth projective toric varieties without the properness assumption on the action. The proof is inspired by toric mirror symmetry.
发表机构
- Westlake University(西湖大学)
- Tsinghua University(清华大学)
- University of Oregon(俄勒冈大学)
- University of Michigan(密歇根大学)
机构由 AI 辅助整理,请以论文原文为准。