报告人：Dr. Casey Blacker（华东师范大学）

时间地点：2018年1月3日，周四， 13:00-14:00，数学楼102（闵行校区）

Abstract:

In a landmark paper, Atiyah and Bott showed that the moduli space of flat connections on a principal bundle over an orientable closed surface is the symplectic reduction of the space of all connections by the action of the gauge group. By appealing to polysymplectic geometry, a generalization of symplectic geometry in which the symplectic form takes values in a given vector space, we may extend this result to the case of higher-dimensional base manifolds. In this setting, the space of connections possesses a natural polysymplectic structure, and the polysymplectic reduction of this space by the action of the gauge group yields the moduli space of flat connections equipped with a 2-form taking values in the cohomology of the base manifold. In this talk, based on the recent preprint arXiv:1810.04924, I will first review the polysymplectic formalism and then outline its role in obtaining the moduli space of flat connections.