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Talks and seminars, possibly part of a conference or series.

Behind the scenes with triple grid diagrams

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Speaker: 
David Gay
Affiliation: 
UGA/MPIM
Date: 
Mon, 30/01/2023 - 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Contact for this takl: Aru Ray (ray@mpim...)

Visualizing fibrations of 4-manifolds -- CANCELLED --

Posted in
Speaker: 
Maggie Miller
Affiliation: 
Stanford University/MPIM
Date: 
Mon, 30/01/2023 - 16:30 - 17:30
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid.
Contact: T. Barthel, V. Ozornova, A. Ray, P. Teichner

Most 3-dimensional techniques for finding fibrations do not have analogues in 4-dimensional topology. In this part of the talk,  I’ll discuss the higher-dimensional analogue of part 1, and hopefully give at least one explicit non-trivial example of a fibration on a surface complement in the 4-sphere or 4-ball.

The Barnes-Hurwitz zeta cocycle on PGL_2(Q)

Posted in
Speaker: 
Milton Espinoza
Affiliation: 
Universidad de La Serena/MPIM
Date: 
Wed, 08/02/2023 - 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

Hybrid. Contact: Pieter Moree (moree@mpim...)

In this talk, we will introduce a group cocycle Z on PGL_2(Q) whose construction relies upon zeta functions of Barnes and Hurwitz. One of the advantages of this cocycle is that it allows us to endow all the Taylor coefficients of Z at s=0 with the same (cohomological) property. If time permits, we will also discuss some applications to the study of ray class zeta functions over real quadratic fields.

Intersection invariants in arbitrary 4-manifolds

Posted in
Speaker: 
Rob Schneiderman
Affiliation: 
City University of New York/MPIM
Date: 
Mon, 30/01/2023 - 12:15 - 14:00
Location: 
MPIM Lecture Hall
Parent event: 
Lectures on "Topics in 4-manifolds"

Seminar webpage: http://people.mpim-bonn.mpg.de/teichner/Math/topics-course.html
Contact: Rob Schneiderman, Peter Teichner

Algebraic and analytic aspects of p-adic groups

Posted in
Speaker: 
Stefan Dawydiak
Affiliation: 
MPIM
Date: 
Thu, 02/02/2023 - 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPI-Oberseminar

Hybrid. Contact: Christian Kaiser (kaiser@mpim-bonn.mpg.de)

Montgomery's pair correlation conjecture and random matrices

Posted in
Speaker: 
Matthias Storzer
Affiliation: 
MPIM
Date: 
Tue, 31/01/2023 - 12:15 - 13:45
Location: 
MPIM Lecture Hall
Parent event: 
IMPRS seminar on various topics: Riemann Zeta function

Hybrid.
Contact: Christian Kaiser (kaiser@mpim-bonn.mpg.de)

Denominators in the asymptotic Hecke algebra and parahoric-fixed vectors

Posted in
Speaker: 
Stefan Dawydiak
Affiliation: 
MPIM
Date: 
Tue, 31/01/2023 - 16:15 - 18:00
Location: 
MPIM Lecture Hall
Parent event: 
Arbeitsgemeinschaft Arithmetische Geometrie

Contact: Peter Scholze (scholze@mpim-bonn.mpg.de)

Spherical designs and modular forms of the D4-lattice

Posted in
Speaker: 
Koji Tasaka
Affiliation: 
Aichi Prefectural University
Date: 
Wed, 01/02/2023 - 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

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

We will talk about a spherical design, one of important combinatorial structures, of the shells of the D4 lattice and its connection to the theory of modular forms, such as weighted theta functions, non-vanishing and congruences of the Fourier coefficients and so on. This is a joint work with Masatake Hirao and Hiroshi Nozaki.

 

Elastic diffeological spaces

Posted in
Speaker: 
Christian Blohmann
Affiliation: 
MPIM
Date: 
Wed, 25/01/2023 - 10:30 - 12:00
Location: 
MPIM Lecture Hall
Parent event: 
Higher Differential Geometry Seminar

I will introduce a class of diffeological spaces, called elastic, on which the left Kan extension of the tangent functor of smooth manifolds defines an abstract tangent functor in the sense of Rosicky. On elastic spaces there is a natural Cartan calculus, consisting of vector fields and differential forms, together with the Lie bracket, de Rham differential, inner derivative, and Lie derivative, satisfying the usual graded commutation relations. Elastic spaces are closed under arbitrary coproducts, finite products, and retracts.

Character formulas, old and new

Posted in
Speaker: 
Gurbir Dhillon
Affiliation: 
Yale University/MPIM
Date: 
Thu, 26/01/2023 - 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPI-Oberseminar

Hybrid. Contact: Christian Kaiser (kaiser@mpim-bonn.mpg.de)

L-functions and/in Selberg Class

Posted in
Speaker: 
Pengcheng Zhang
Affiliation: 
MPIM
Date: 
Tue, 24/01/2023 - 12:15 - 13:45
Location: 
MPIM Lecture Hall
Parent event: 
IMPRS seminar on various topics: Riemann Zeta function

Hybrid. Contact: Christian Kaiser (kaiser@mpim-bonn.mpg.de)

A Thurston compactification of the space of Bridgeland stability conditions

Posted in
Speaker: 
Naoki Koseki
Affiliation: 
Liverpool
Date: 
Thu, 02/02/2023 - 10:30 - 11:30
Location: 
MPIM Lecture Hall
Parent event: 
Seminar Algebraic Geometry (SAG)

Contact: Daniel Huybrechts.
 

Depth 0 local Langlands via global chtoucas

Posted in
Speaker: 
Arnaud Eteve
Affiliation: 
Sorbonne Université, Paris
Date: 
Tue, 24/01/2023 - 16:15 - 18:00
Location: 
MPIM Lecture Hall
Parent event: 
Arbeitsgemeinschaft Arithmetische Geometrie

Contact: Peter Scholze (scholze@mpim-bonn.mpg.de)

Visualizing fibrations of 3-manifolds -- CANCELLED --

Posted in
Speaker: 
Maggie Miller
Affiliation: 
Stanford University/MPIM
Date: 
Mon, 30/01/2023 - 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid.
Contact: T. Barthel, V. Ozornova, A. Ray, P. Teichner

Motivic and arithmetic aspects of exceptional loci

Posted in
Speaker: 
Tobias Kreutz
Affiliation: 
MPIM
Date: 
Thu, 26/01/2023 - 10:30 - 11:30
Location: 
MPIM Lecture Hall
Parent event: 
Seminar Algebraic Geometry (SAG)

Contact: Daniel Huybrechts

On some counting questions for integral matrices

Posted in
Speaker: 
Igor Shparlinski
Affiliation: 
University of New South Wales/MPIM
Date: 
Wed, 25/01/2023 - 14:30 - 15:30
Parent event: 
Number theory lunch seminar

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

Whitney towers and homotopy limits

Posted in
Speaker: 
Peter Teichner
Affiliation: 
MPIM
Date: 
Mon, 16/01/2023 - 12:15 - 14:00
Location: 
MPIM Lecture Hall
Parent event: 
Lectures on "Topics in 4-manifolds"

Seminar webpage: http://people.mpim-bonn.mpg.de/teichner/Math/topics-course.html
Contact: Rob Schneiderman, Peter Teichner

The Tate Conjecture over Finite Fields for Varieties with h^{2,0} = 1

Posted in
Speaker: 
Ziquan Yang
Affiliation: 
UW Madison
Date: 
Thu, 19/01/2023 - 10:30 - 11:30
Location: 
MPIM Lecture Hall
Parent event: 
Seminar Algebraic Geometry (SAG)

Contact: Daniel Huybrechts.

 

Singular Chains on Lie groups, the Cartan relations and Chern-Weil theory

Posted in
Speaker: 
Camilo Arias Abad
Affiliation: 
Universidad Nacional de Colombia/MPIM
Date: 
Mon, 16/01/2023 - 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid.
Contact: Tobias Barthel, Viktoriya Ozornova, Teter Teichner, Aru Ray

Diophantine equations and the Riemann Hypothesis (variation on a theme of Matiyasevich)

Posted in
Speaker: 
Boris Z. Moroz
Affiliation: 
MIPT, Moscow/Universität Bonn
Date: 
Wed, 18/01/2023 - 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

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

I shall describe a relatively simple Diophantine equation, whose insolubility is equivalent to the
Riemann Hypothesis.

 

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