Termine

|
Anke Pietsch

Tee-Seminar: Ilaria Castellano (Universität Bielefeld): Invariants of t.d.l.c. groups acting on locally finite buildings

Monday, 22.04.2024 14:15 im Raum SR1C

Mathematik und Informatik

Given a totally disconnected locally compact group G that has a sufficiently transitive action on a locally finite building ?, we aim to investigate some invariants of G and uncover the relation to the analogue invariants of the type W of ?. In particular, we will talk about the rational discrete cohomological dimension and the number of ends of G. Work in progress with Bianca Marchionna and Thomas Weigel, Università di Milano Bicocca.



Angelegt am Thursday, 04.04.2024 10:19 von Anke Pietsch
Geändert am Thursday, 04.04.2024 10:30 von Anke Pietsch
[Edit | Vorlage]

Oberseminare und sonstige Vorträge
|
Sandra Huppert

Oberseminar Differentialgeometrie: Stephan Stadler (MPI Bonn), Vortrag: Rigidity of ideal symmetric sets

Monday, 22.04.2024 16:00 im Raum SRZ 214

Mathematik und Informatik

Abstract: A subset in the ideal boundary of a CAT(0) space is called symmetric if every complete geodesic with one ideal boundary point in the set has both ideal boundary points in the set. In the late 80s Eberlein proved that if a Hadamard manifold contains a non-trivial closed symmetric subset in its ideal boundary, then its holonomy group cannot act transitively. This leads to rigidty via the Berger-Simons Theorem. I will discuss rigidity of ideal symmetric sets in the general context of locally compact geodesically complete CAT(0) spaces.



Angelegt am Thursday, 07.03.2024 10:41 von Sandra Huppert
Geändert am Monday, 25.03.2024 07:57 von Sandra Huppert
[Edit | Vorlage]

Oberseminare und sonstige Vorträge
Sonstige Vorträge
|
Heike Harenbrock

Mittagsseminar zur Arithmetik: Felix Schremmer (Hong Kong): Beyond minute admissible sets

Tuesday, 23.04.2024 10:15 im Raum SRZ 216/217

Mathematik und Informatik

If a Shimura variety is fully Hodge-Newton decomposable, its mod p reduction enjoys particularly nice properties. These cases are well-understood and characterized by a certain inequality known as the minute condition. In a joint project with Xuhua He and Eva Viehmann, we study the next larger cases, where the minute condition is barely not satisfied any more. I will give a classification of these cases and explain the geometric properties of the corresponding Ekedahl-Oort and Kottwitz-Rapoport strata. The Ekedahl-Oort strata are described by a new class of affine Deligne-Lusztig varieties introduced in a joint work with Ryosuke Shimada and Qingchao Yu. For these affine Deligne-Lusztig varieties of positive Coxter type, we give a full description of their dimensions and the sets of irreducible components.



Angelegt am Monday, 08.04.2024 10:06 von Heike Harenbrock
Geändert am Monday, 08.04.2024 10:06 von Heike Harenbrock
[Edit | Vorlage]

Oberseminare und sonstige Vorträge
Sonstige Vorträge
Vorträge des SFB 1442
|
Claudia Rüdiger

Oberseminar Topologie: Gong Show

Wednesday, 17.04.2024 16:30 im Raum M4

Mathematik und Informatik

There will be 8 speakers, each will have 5 minutes for a blackboard talk and 2 minutes to answer 1-2 questions from the audience. The line-up and titles are follows: 1. Arthur Bartels: K-theory of Hecke algebras 2. Konrad Bals: The Topological Cartier--Raynaud Ring 3. Johannes Ebert: Tautological classes and higher signatures 4. Robert Szafarczyk: Number rings over the sphere spectrum 5. Edith Hübner: Animated lambda-rings and Frobenius lifts 6. Michael Weiss: The diffeomorphism group of an exotic sphere 7. Devarshi Mukherjee: Bivariant homotopy algebraic K-theory 8. Thomas Nikolaus: Maps between spherical group rings



Angelegt am Wednesday, 17.04.2024 06:23 von Claudia Rüdiger
Geändert am Wednesday, 17.04.2024 06:23 von Claudia Rüdiger
[Edit | Vorlage]

Oberseminare und sonstige Vorträge
Sonstige Vorträge
Veranstaltungen am Mathematischen Institut
|
Imke Franzmeier

Franzmeier/Wensing: MM Spotlight on Shaping the doctoral phase

Tuesday, 23.04.2024 13:00 im Raum Cluster Meeting Room

Mathematik und Informatik

MM Spotlight on Shaping the doctoral phase (for MMGS members in their first and second year) offered by the MM Early Career Support



Angelegt am Thursday, 04.04.2024 10:09 von Imke Franzmeier
Geändert am Thursday, 11.04.2024 09:25 von Imke Franzmeier
[Edit | Vorlage]

Mathematics Münster
Dates and Events of MM Graduate School
MM Connect
|
Elke Enning

Aaron Tikuisis (z.Z. Oxford): Central sequences and topological dynamics. Oberseminar C*-Algebren.

Tuesday, 23.04.2024 16:15 im Raum SRZ 216/217

Mathematik und Informatik

Central sequences play a fundamental role in operator algebras, from property Gamma and the MacDuff property for II_1 factors to characterizations of tensorial absorption for C*-algebras, for example. Given the deep link between operator algebras and dynamics, it is natural to look for dynamical analogues of central sequence properties. This turns out to be subtle. In joint work with Grigorios Kopsacheilis, Hung-Chang Liao, and Andrea Vaccaro, a central sequence property (uniform property Gamma) is shown to be equivalent to a topological dynamical property (the small boundary property). I will discuss a body of work related to these ideas.



Angelegt am Thursday, 04.04.2024 07:55 von Elke Enning
Geändert am Thursday, 11.04.2024 06:37 von Elke Enning
[Edit | Vorlage]

Oberseminare und sonstige Vorträge
Vorträge des SFB 1442
Veranstaltungen am Mathematischen Institut