Oberseminare und sonstige Vorträge

The seminar will be held via zoom. If you are not a member of the topology group and wish to participate, write an e-mail to jens.reinhold@uni-muenster.de in order to receive the meeting ID.
Thurston showed that the ways a 3-manifold fibres over the circle are controlled by a topologically-defined polytope. Dawid Kielak recently gave a generalization, using algebraic methods, that also covers free-by-cyclic groups. I will discuss joint work with Kielak in which we make this algorithmic.

Starting from the classical Riemann-Roch theorem, I will describe the gradual generalizations leading to the Grothendieck-Riemann-Roch theorem. After this expository part, I will then describe some ideas in progress how to use the category of motives on stacks (developed in previous joint work with Timo Richarz) can be used to gain a conceptual proof of the equivariant GRR theorem.

We will meet here: https://wwu.zoom.us/j/98750589020

via ZOOM