The talk will begin with an introduction to difference algebraic groups, i.e., groups defined by algebraic difference equations. Like étale algebraic groups can be described as finite groups with a continuous action of the absolute Galois group of the base field, étale difference algebraic groups can be described as certain profinite groups with some extra structure. Étale difference algebraic groups satisfy a decomposition theorem that shows that they can all be build from étale algebraic groups and finite groups equipped with an endomorphism.
Étale difference algebraic groups
Dr Michael Wibmer (RWTH Aachen)
Tue, 26/05/2015 - 16:00