arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1802.01362math.AGmath.NTmath.RT
收藏

Shtukas堆的尖点上同调

Cuspidal cohomology of stacks of shtukas

Cong Xue

摘要:

设$G$是有限域${\mathbb F}_q$上的连通分裂约化群,$X$是${\mathbb F}_q$上的光滑射影几何连通曲线. $G$ -shtukas的栈的$\ell$ -adic上同调是$X$的函数域上具有紧支撑的自守形式空间的推广。本文构造了shtukas栈上同调的常数项态射,它是自守形式常数项态射的推广。我们还定义了尖点上同调,它推广了尖点自守形式空间。证明了尖点上同调的维数是有限的,并且它与V. Lafforgue定义的(有理)Heck有限上同调是等价的.

英文摘要:

Let $G$ be a connected split reductive group over a finite field ${\mathbb F}_q$ and $X$ a smooth projective geometrically connected curve over ${\mathbb F}_q$. The $\ell$-adic cohomology of stacks of $G$-shtukas is a generalization of the space of automorphic forms with compact support over the function field of $X$. In this paper, we construct a constant term morphism on the cohomology of stacks of shtukas which is a generalization of the constant term morphism for automorphic forms. We also define the cuspidal cohomology which generalizes the space of cuspidal automorphic forms. Then we show that the cuspidal cohomology has finite dimension and that it is equal to the (rationally) Hecke-finite cohomology defined by V. Lafforgue.

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。

↑