The geometry of root stacks and gerbes

Abstract: Root stacks and gerbes were defined recently and have been very useful in algebraic geometry. I will give an introduction to these objects, providing several ways of understanding and visualizing them. Then I will describe some applications to Gromov-Witten theory, enumerative geometry, and toric geometry.

Refreshments will be served at 2:45 p.m. (Math Lounge, MATX 1115).