VIRTUAL CLASSES OF Gm-GERBES

VIRTUAL CLASSES OF Gm-GERBES
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Gm-Gerbes 虚拟课程

DOI:
10.1007/s00229-020-01245-8
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发表时间:
2021
影响因子:
0.6
通讯作者:
F. Qu
F. Qu
中科院分区:
数学4区
文献类型:
--
作者:
F. Qu

文献摘要

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我们证明了a-gerbe的完全阻塞理论决定了它的基的半完全阻塞理论,如果a-gerbe是拟紧的和仿射点的,则它是完美的。这些结果简化了基座的半完美阻塞理论的构造,并允许我们将细菌和其基座的虚拟类联系起来。
We show that a perfect obstruction theory for a-gerbe determines a semi-perfect obstruction theory for its base, which is perfect if the gerbe is quasi-compact and affine-pointed. These results streamline the construction of a semi-perfect obstruction theory for the base, and allow us to relate virtual classes of the gerbe and its base.