Oberseminare und sonstige Vorträge

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boeckena

Giles Gardam (WWU Münster) : Computing fibrings of 3-manifolds and free-by-cyclic groups. (Oberseminar Topologie)

Montag, 13.07.2020 14:30
Mathematik und Informatik

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.



Angelegt am Mittwoch, 24.06.2020 13:49 von boeckena
Geändert am Donnerstag, 09.07.2020 10:30 von elke
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Oberseminare und sonstige Vorträge
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weckerm

Jakob Scholbach: Equivariant Grothendieck-Riemann-Roch theorem (ZOOM; Mittagsseminar zur Arithmetik)

Dienstag, 07.07.2020 10:15
Mathematik und Informatik

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



Angelegt am Montag, 06.07.2020 08:03 von weckerm
Geändert am Montag, 06.07.2020 08:05 von weckerm
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Oberseminare und sonstige Vorträge