Microlocal sheaf categories and the $J$-homomorphism
Microlocal sheaf categories and the $J$-homomorphism
复制标题
微局部束类别和 $J$ 同态
DOI:
--
复制
发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Xin Jin
中科院分区:
文献类型:
--
作者:
Xin Jin
Let $X$ be a smooth manifold and $mathbf{k}$ be a commutative (or at least $mathbb{E}_2$) ring spectrum. Given a smooth exact Lagrangian $Lhookrightarrow T^*X$, the microlocal sheaf theory (following Kashiwara--Schapira) naturally assigns a locally constant sheaf of categories on $L$ with fiber equivalent to the category of $mathbf{k}$-spectra $mathrm{Mod}(mathbf{k})$. We show that the classifying map for the local system of categories factors through the stable Gauss map $L
ightarrow U/O$ and the delooping of the $J$-homomorphism $U/O
ightarrow Bmathrm{Pic}(mathbf{S})$. As an application, combining with previous results of Guillermou [Gui], we recover a result of Abouzaid--Kragh [AbKr] on the triviality of the composition $L
ightarrow U/O
ightarrow Bmathrm{Pic}(mathbf{S})$, when $L$ is in addition compact.
DOI:
10.4171/prims/57-3-10
发表时间:
2021
影响因子:
1.2
作者:
Shende, Vivek
通讯作者:
Shende, Vivek