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arXiv 1204.2628math.AGmath.RA
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代数群的凝聚上同调环

The coherent cohomology ring of an algebraic group

Michel Brion

摘要:

设$G$是域上有限型概形,考虑系数在结构层中的上同调环$H^*(G)$.证明了$H^*(G)$是其0次分支上的有限秩的自由模,并且是其1次分支的外代数。当$G$连通时,我们确定了$H^*(G)$的霍普夫代数结构.

英文摘要:

Let $G$ be a group scheme of finite type over a field, and consider the cohomology ring $H^*(G)$ with coefficients in the structure sheaf. We show that $H^*(G)$ is a free module of finite rank over its component of degree 0, and is the exterior algebra of its component of degree 1. When $G$ is connected, we determine the Hopf algebra structure of $H^*(G)$.

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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