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MPI-Oberseminar

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Organiser(s): 
C. Kaiser
Date: 
Thu, 31/01/2013 - 15:00 - Thu, 31/12/2026 - 16:00
Location: 
MPIM Lecture Hall

The Oberseminar is a very long running seminar at MPI (‘Ober‘ standing for 'upper'). Its idea is that the guests of the MPI speak in this seminar (hopefully early in their stay) and get the chance to explain their work to the other guests.

Friedrich Hirzebruch Lecture

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Location: 
University Club Bonn

The annual Friedrich Hirzebruch Lecture is a series of lectures started in 2007 on the occasion of the 80th birthday of Prof. Friedrich Hirzebruch. The lectures address a general audience and aim at illustrating the relation between mathematics and art, society and other fields.

A conference on Algebraic Topology, in memory of Hans-Joachim Baues

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Date: 
Mon, 17/10/2022 - 08:00 - Fri, 21/10/2022 - 16:00

A conference on Algebraic Topology, in memory of Hans-Joachim Baues

This conference is intended to provide an overview of current research in homotopy theory, which has vastly expanded since its roots in the 19th century from the study of topological spaces by algebraic and combinatorial means to other fields of mathematics, including algebraic geometry, differential topology, and mathematical physics.

tba

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Speaker: 
Ivan Horozov
Affiliation: 
MPIM/City University of New York, Bronx
Date: 
Wed, 20/07/2022 - 14:30 - 15:30
Parent event: 
Number theory lunch seminar

Contact: Pieter Moree (moree@mpim-bonn.mpg.de)

[Obersem. Diff. Geometry/Venue: Math. Center, Endenicher Allee 60] "The Yamabe Invariant of Complex Surfaces"

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Speaker: 
Michael Albanese
Affiliation: 
Université du Québec à Montréal
Date: 
Thu, 14/07/2022 - 16:30 - 17:30

Please note the VENUE of this talk:
Math Center, Endenicher Allee 60, Room 0.011, Bonn University.
Contact: Stephan Stadler (stadler@mpim-bonn.mpg.de).

 

The Yamabe invariant is a real-valued diffeomorphism invariant coming from Riemannian geometry. Using Seiberg-Witten theory, LeBrun showed that the sign of the Yamabe invariant of a Kähler surface is determined by its Kodaira dimension. We consider the extent to which this remains true when the Kähler hypothesis is removed. This is joint work with Claude LeBrun.

 

The beauty of braids - from knot invariants to higher categories

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Speaker: 
Catharina Stroppel
Affiliation: 
Universität Bonn
Date: 
Wed, 13/07/2022 - 10:15 - 11:15
Location: 
MPIM Lecture Hall

Via different perspectives on braids we indicate how the search for topological invariants leads to crucial developments in representation theory and to speculations on higher topological invariants and TQFTs.

 

https://icm2022.abstractserver.com/program/#/details/sessions/55

Motivic Cohomology: past, present and future

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Speaker: 
Marc Levine
Affiliation: 
Universität Duisburg-Essen
Date: 
Tue, 12/07/2022 - 14:15 - 15:00
Location: 
MPIM Lecture Hall

I will give a brief overview of the development of motivic cohomology, its parallels with singular cohomology and its place in motivic stable homotopy theory. I will then describe some of the recent off-shoots of motivic cohomology: cycles with modulus, Chow-Witt theory, and motivic filtrations on p-adic K-theory, and conclude with some speculations on future developments.

 

https://icm2022.abstractserver.com/program/#/details/sessions/211

From statistical to causal learning

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Speaker: 
Bernhard Schölkopf
Affiliation: 
MPI for Intelligent Systems, Tübingen
Date: 
Mon, 11/07/2022 - 14:15 - 15:00
Location: 
MPIM Lecture Hall

We describe basic ideas underlying research to build and understand artificially intelligent systems: from symbolic approaches via statistical learning to interventional models relying on concepts of causality. Some of the hard open problems of machine learning and AI are intrinsically related to causality, and progress may require advances in our understanding of how to model and infer causality from data.

https://icm2022.abstractserver.com/program/#/details/sessions/207

[Oberseminar Diff. Geometry/Venue: Lipschitz-Saal, Endenicher Allee 60] "Stability of hyperbolic metrics"

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Speaker: 
Frieder Jäckel
Affiliation: 
Universität Bonn
Date: 
Thu, 07/07/2022 - 16:30 - 17:30

Please note the VENUE of this talk:
Lipschitz-Saal, Endenicher Allee 60, Math. Center, Bonn University.
Contact: Stephan Stadler (stadler@mpim-bonn.mpg.de).

 

We show that if a 3-manifold admits a metric of finite volume
that is almost hyperbolic in a suitable, then there exists a hyperbolic
metric that is close to the given metric in the $C^{2,\alpha}$-topology.
We then discuss an application of this result to the drilling and filling of
hyperbolic 3-manifolds. The talk is based on joint work with Ursula
Hamenstädt.

Rogers-Ramanujan type identities and arc spaces [AG&Phys Seminar/ on Zoom]

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Speaker: 
Hussein Mourtada
Affiliation: 
Institut Mathematique de Jussieu
Date: 
Tue, 05/07/2022 - 13:45 - 15:30

Online talk only.

https://hu-berlin.zoom.us/j/61686623112 

Contact: Gaetan Borot (HU Berlin, gaetan.borot@hu-berlin.de)

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