Minimal extensions of symmetric fusion categories and Witt groups
组织者
演讲者
Dmitri Nikshych
时间
2022年11月15日 09:30 至 11:00
地点
1129B
线上
Zoom 537 192 5549
(BIMSA)
摘要
Groups of minimal extensions of symmetric fusion categories were introduced by Lan, Kong, and Wen to study symmetry protected topological phases of matter. We describe how these groups are related to categorical Witt groups and how to compute them using a categorical analogue of the Kunneth formula in group cohomology.