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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.

Surgery Theory and 4-manifolds

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Speaker: 
Mark Powell
Affiliation: 
Durham/MPIM
Date: 
Mon, 2021-04-19 14:00 - 15:00
Parent event: 
MPIM Topology Seminar
I will talk about applications of surgery theory to classifications results in 4-manifolds.
 
This is the second of three talks in the following series. 
 
Series title: Applied surgery
Series abstract: Surgery is the key tool for classifying manifolds, up to homeomorphism or diffeomorphism. This sequence of talks will give an introduction to this tool, and then apply
it to specific questions in four manifold topology.
 

Meeting ID: 916 5855 1117
Password: as before.

Positivity, higher Teichmüller spaces and (non-commutative) cluster algebras

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Speaker: 
Anna Wienhard
Affiliation: 
Heidelberg Universität
Date: 
Tue, 2021-04-20 14:00 - 15:30
Parent event: 
Seminar on Algebra, Geometry and Physics/joint with HU Berlin

https://hu-berlin.zoom.us/j/61339297016
 

Maxima of a Random Model of the Riemann Zeta Function over Intervals of Varying Length

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Speaker: 
Lisa Hartung
Affiliation: 
Universität Mainz
Date: 
Wed, 2021-04-21 14:30 - 15:30
Parent event: 
Number theory lunch seminar

Zoom Meeting ID: 919 6497 4060
For password see the email or contact Pieter Moree (moree@mpim...).

Formalism of Perverse Sheaves

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Speaker: 
Gregory Andreychev
Affiliation: 
Universität Bonn/MPIM
Date: 
Wed, 2021-04-21 16:15 - 17:45
Parent event: 
IMPRS seminar on various topics: Perverse sheaves

Zoom Meeting-ID: 994 2805 4844
For passcode please contact Christian Kaiser (kaiser@mpim...).

Topological rigidity and low dimensional topology

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Speaker: 
Jim Davis
Affiliation: 
Bloomington/MPIM
Date: 
Mon, 2021-04-26 14:00 - 15:00
Parent event: 
MPIM Topology Seminar
An aspherical manifold is a manifold whose universal cover is contractible, i.e. a K(\pi,1)-manifold. Borel conjectured that any two closed aspherical manifolds with isomorphic fundamental groups are homeomorphic, in fact, that the structure set of an aspherical manifold is trivial. Wall asked if a K(\pi,1)-space which satisfies Poincare duality is homotopy equivalent to a closed manifold.

Bilinear discretization of quadratic vector fields: integrability and geometry

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Speaker: 
Yuri B. Suris
Affiliation: 
TU Berlin
Date: 
Tue, 2021-04-27 14:00 - 15:30
Parent event: 
Seminar on Algebra, Geometry and Physics/joint with HU Berlin

https://hu-berlin.zoom.us/j/61339297016
 

We discuss dynamics of birational maps which appear as bilinear discretizations of quadratic vector fields. The corresponding dynamical systems turn out to be integrable much more often than could be expected. Various aspects of integrability of birational dynamical systems will be discussed, along with remarkable geometric structures behind some of the particular examples.

Perverse Sheaves and Morse Theory

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Speaker: 
Axel Koelschbach
Affiliation: 
Universität Bonn/MPIM
Date: 
Wed, 2021-04-28 16:15 - 17:45
Parent event: 
IMPRS seminar on various topics: Perverse sheaves

Zoom Meeting-ID: 994 2805 4844
For passcode please contact Christian Kaiser (kaiser@mpim...).

Geometry without spaces: a hyperbolic parable

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Speaker: 
Nicolas Monod
Affiliation: 
École Polytechnique Fédérale de Lausanne (EPFL)
Date: 
Thu, 2021-04-29 16:30 - 18:00
Parent event: 
Oberseminar Differentialgeometrie

We revisit old ideas that are shared by functional analysts and logicians alike, in order to do hyperbolic geometry without bothering with practicalities such as spaces or dimension.

Our main interest will be the interplay between (real or complex) hyperbolic geometry and group representations.

 

tba

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Speaker: 
Matthias Kreck
Affiliation: 
Universität Bonn
Date: 
Mon, 2021-05-03 14:00 - 15:00
Parent event: 
MPIM Topology Seminar

Meeting ID: 916 5855 1117
Password: as before.
Contact: Aru Ray and Tobias Barthel.
 

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