Giles Gardam (WWU Münster) : Computing fibrings of 3-manifolds and free-by-cyclic groups. (Oberseminar Topologie)
Montag, 13.07.2020 14:30
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 firstname.lastname@example.org 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.
Angelegt am Mittwoch, 24.06.2020 13:49 von boeckena
Geändert am Donnerstag, 09.07.2020 10:30 von elke
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Jakob Scholbach: Equivariant Grothendieck-Riemann-Roch theorem (ZOOM; Mittagsseminar zur Arithmetik)
Dienstag, 07.07.2020 10:15
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