# Events

Conferences, seminars, talks and other events at the MPI for Mathematics

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## Virtual ICM 2022. Live stream and in person talks at the Max Planck Institute for Mathematics

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Date:
Tue, 05/07/2022 (All day) - Thu, 14/07/2022 (All day)
The International Congress of Mathematicians 2022 (ICM 2022), which was originally planned for St. Petersburg, will now take place as a fully virtual event over 5–14 July 2022. In order to keep some of the spirit of the ICM, all talks will be streamed live in the MPIM lecture hall. Three of the talks will be given in person at MPIM by Bernhard Schölkopf, Marc Levine, and Catharina Stroppel.

## 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.

## Upcoming Talks

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Abstracts of upcoming talks at the MPIM. For an overview see also the calendar.

## Recent developments in Quantum Topology -- Cancelled --

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We will review the basics of quantum topology such as the colored Jones polynomial of a knot, its standard conjectures relating to asymptotics, arithmeticity and modularity, as well as the recent quantum hyperbolic invariants of Kashaev et al, their state-integrals and their structural properties. The course is aimed to be accessible by graduate students and young researchers.

## 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)

## [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.

## 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

## 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

## 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

## [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.

## 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)

## Mathematical events in Bonn

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##### Bonn Mathematics Calendar

All mathematical events in Bonn are listed in the Bonn Mathematics Calendar. For directions see the map.

##### University Calendar

All lectures and courses at Bonn University can be found in the university calendar.

## Recurring seminars, series and courses

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Detailed list of recurring seminars, series of talks, and courses or lectures comprising multiple talks. For an overview see also the calendar.

## 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.

## 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.

## Extra talk

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This is a collection of extra talks that don't fit into the other series.

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Organiser(s):
Peter Scholze

## IMPRS seminar on various topics: Period Polynomials and Meromorphic Modular Forms

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Meeting-ID: 994 2805 4844

For passcode contact Christian Kaiser (kaiser@mpim...).

## Topics in Topology

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Location:
MPIM Lecture Hall
Parent event:
MPIM Topology Seminar

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## Representation theory learning seminar

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Organiser(s):
Hankyung Ko, Emily Norton, Thorsten Heidersdorf

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Organiser(s):
C. Kaiser

## A study group on Milnor invariants

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Organiser(s):
Danica Kosanovich
Affiliation:
MPIM
Location:
MPIM Seminar Room

## Archived Events

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To narrow the list of events displayed please select year and event type or fill the search fields, then press Apply.

## MPI-Oberseminar

Posted in
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

Posted in
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

Posted in
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

Posted in
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"

Posted in
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

Posted in
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

Posted in
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

Posted in
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"

Posted in
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]

Posted in
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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