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arXiv 1306.5418math.AG
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方案和栈上的张量生成器

Tensor generators on schemes and stacks

Philipp Gross

摘要:

我们证明了具有仿射稳定群的代数栈满足分解性质当且仅当它是一个拟仿射格式在一般线性群作用下的商,或者等价地,如果存在一个向量丛,其相关的标架丛具有拟仿射全空间.这推广了B.东太郎到非正规和非诺特计划和代数堆栈。此外,我们还证明了向量丛诱导这样的商结构当且仅当它是准凝聚层范畴中的张量生成元。

英文摘要:

We show that an algebraic stack with affine stabilizer groups satisfies the resolution property if and only if it is a quotient of a quasi-affine scheme by the action of the general linear group, or equivalently, if there exists a vector bundle whose associated frame bundle has quasi-affine total space. This generalizes a result of B. Totaro to non-normal and non-noetherian schemes and algebraic stacks. Also, we show that the vector bundle induces such a quotient structure if and only if it is a tensor generator in the category of quasi-coherent sheaves.

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