November 28, 2017
Michael Lambert (Dalhousie), Principal Bundles and Torsors as Flat Functors
Abstract: I will revisit some well-known background material on flat presheaves and their
relationship to principal bundles and torsors over a topological space. I will use this material
to motivate the central questions of my current research. In particular I will indicate how one
version of flatness can be categorified to the situation of 2-category-valued pseudo-functors.