Topology Seminar: Nicolo Sibilla

  • Date: 03/25/2015
  • Time: 15:15
Nicolo Sibilla, UBC

University of British Columbia


Cetegorification of orbifold products and derived loop stacks


The existence of interesting multiplicative cohomology theories for orbifolds was first suggested by string theorists, and orbifold products have been intensely studied by mathematicians for the last fifteen years. My work with S. Scherotzke focuses on the virtual orbifold product introduced by Lupercio et al. (2007). We construct a categorification of the virtual orbifold product that leverages the geometry of derived loop stacks. By work of Ben-Zvi Francis Nadler, this reveals connections between virtual orbifold products and Drinfeld centers of monoidal categories, thus answering a question of Hinich.

Other Information: 

Location: ESB 4133