Christopher Deninger (WWU Münster): Topological spaces attached to systems of Diophantine equations. (Oberseminar Topologie)

We attach some pretty gruesome topological spaces to systems of Diophantine equations. These spaces are equipped with an action of the multiplicative group of p...

Oberseminar Differentialgeometrie: Elena Mäder-Baumdicker (Darmstadt): Willmore spheres are unstable

Abstract: I will explain what the Willmore Morse Index of unbranched Willmore spheres in Euclidean three-space is and how to compute it. A consequence of that c...

Mikael de la Salle (Lyon): Fourier analysis on Lie group von Neumann algebras. Oberseminar C*-Algebren.

Oberseminar p-adische Arithmetik: Urs Hartl: Algebraic Stacks III

14:15 // Leonie Schmeller (WWU Münster): Derivation of linearized elasticity from nonlinear multiwell energies

Sahana Balasubramanya (Münster): Hyperbolic structures on groups. (Geometric Group Theory Seminar)

For any group G, I will define the set of hyperbolic structures on G, denoted H(G), which consists of equivalence classes of (possibly infinite) generating sets...

Pierre Touchard: Burden in exact sequences of abelian groups

In model theory, the burden is a notion of dimension for NTP2 structures, which form a relatively tame class of first order structures. Chernikov and Simon (201...

Kolloquium Wilhelm Killing: Prof. Dr. Marc Levine (Duisburg-Essen): GWGW theory

Abstract: We will describe recent work constructing refinements to the Grothendieck-Witt ring of a number of integer-valued invariants found in enumerative geom...