Highlights

Jean Renault - Abstract

 I will illustrate the usefulness of the notion of groupoid in various areas of mathematics. In the theory of dierential equations, it is closely related to the notions of ows, foliations and Lie algebroids.

Stefaan Caenepeel  - Abstract

Classical results state that the Brauer group of a commutative ring, and the group of Galois objects of a cocommutative Hopf algebra can be interpreted as a second cohomology group.