arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1811.02468math.AG
收藏

Whittaker类别的本地和全球版本

The local and global versions of the Whittaker category

Dennis Gaitsgory

摘要:

给定一个由环群G((t))作用的范畴C,我们定义它的Whittaker模型Whit(C)为C^{N((t)),χ},其中χ是一个非退化特征标.我们研究了这种结构的性质。当C是G((t))与同余子群的商上的层范畴时,我们找到了Whit(C)的“有限维”模型;相应的几何对象是Drinfeld紧化,记为\overline{Bun}_N(具有极点和水平结构)。

英文摘要:

Given a category C acted on by the loop group G((t)), we define its Whittaker model Whit(C) as C^{N((t)),χ}, where χis a non-degenerate character. We study the properties of this construction. When C is the category of sheaves on the quotient of G((t)) by a congruence subgroup, we find a "finite-dimensional" model for Whit(C); the corresponding geometric object is Drinfeld's compactification, denoted \overline{Bun}_N (with poles and level structure).

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。

↑