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

Congruences via fibered motives, II

Posted in
Speaker: 
Duco van Straten
Zugehörigkeit: 
Universität Mainz
Datum: 
Mit, 05/10/2022 - 15:15 - 16:00
Location: 
MPIM Lecture Hall

 

We explain the principle whereby the existence of a Fano topology with certain numerical property might lead to congruences between automorphic forms, and prove an arithmetic--geometric counterpart of a congruence between a paramodular form and a Hilbert modular form by fibering out a Calabi--Yau motive.

 

Congruences via fibered motives, I

Posted in
Speaker: 
Vasily Golyshev
Zugehörigkeit: 
Paris
Datum: 
Mit, 05/10/2022 - 14:30 - 15:15
Location: 
MPIM Lecture Hall

 

We explain the principle whereby the existence of a Fano topology with certain numerical property might lead to congruences between automorphic forms, and prove an arithmetic--geometric counterpart of a congruence between a paramodular form and a Hilbert modular form by fibering out a Calabi--Yau motive.

 

Algebras of amenable representation type

Posted in
Speaker: 
Sebastian Eckert
Zugehörigkeit: 
MPIM
Datum: 
Don, 06/10/2022 - 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPI-Oberseminar

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

 

Infinity local systems on classifying spaces and Lie theory

Posted in
Speaker: 
Camilo Arias Abad
Zugehörigkeit: 
Universidad Nacional de Colombia / MPIM
Datum: 
Mit, 28/09/2022 - 10:30 - 12:00
Location: 
MPIM Lecture Hall

tba

Posted in
Speaker: 
Sarah Blackwell
Zugehörigkeit: 
University of Georgia/MPIM
Datum: 
Mon, 10/10/2022 - 15:45 - 15:55
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid talk.
Contact for details: Tobias Barthel, Viktoriya Ozornova, Aru Ray, Peter Teichner.

Introductory talk.

tba

Posted in
Speaker: 
Oussama Bensaid
Zugehörigkeit: 
Université Pierre et Marie Curie/MPIM
Datum: 
Mon, 10/10/2022 - 15:30 - 15:40
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid talk.
Contact for details: Tobias Barthel, Viktoriya Ozornova, Aru Ray, Peter Teichner.

Introductory talk.

tba

Posted in
Speaker: 
Sudipta Ghosh
Zugehörigkeit: 
Louisiana State University/MPIM
Datum: 
Mon, 10/10/2022 - 15:15 - 15:25
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid talk.
Contact for details: Tobias Barthel, Viktoriya Ozornova, Aru Ray, Peter Teichner.

Introductory talk.

tba

Posted in
Speaker: 
Nima Rasekh
Zugehörigkeit: 
MPIM
Datum: 
Mon, 10/10/2022 - 15:00 - 15:10
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid talk.
Contact for details: Tobias Barthel, Viktoriya Ozornova, Aru Ray, Peter Teichner.

Introductory talk.

r-th roots: better negative than positive

Posted in
Speaker: 
Nitin Kumar Chidambaram
Zugehörigkeit: 
University of Edinburgh
Datum: 
Die, 01/11/2022 - 14:00 - 15:00

Connection link: https://hu-berlin.zoom.us/j/61686623112
Contact: Gaetan Borot (gaetan.borot@hu-berlin.de)

 

Higher real K-theories in chromatic homotopy theory

Posted in
Speaker: 
Guchuan Li
Zugehörigkeit: 
University of Michingan/MPIM
Datum: 
Mon, 26/09/2022 - 15:15 - 15:25
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid talk.
Contact for details: Tobias Barthel, Viktoriya Ozornova, Aru Ray, Peter Teichner.

Introductory talk.

Obstructions and realizations in K(n)-local stable homotopy theory

Posted in
Speaker: 
Paul VanKoughnett
Zugehörigkeit: 
MPIM
Datum: 
Mon, 26/09/2022 - 15:45 - 15:55
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid talk.
Contact for details: Tobias Barthel, Viktoriya Ozornova, Aru Ray, Peter Teichner.

Introductory talk.

Understanding exotic spheres through the stable stems

Posted in
Speaker: 
James D. Quigley
Zugehörigkeit: 
Cornell University/MPIM
Datum: 
Mon, 26/09/2022 - 15:00 - 15:10
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid talk.
Contact for details: Tobias Barthel, Viktoriya Ozornova, Aru Ray, Peter Teichner.

Introductory talk.

Khovanov homology in 4-manifolds

Posted in
Speaker: 
Isaac Sundberg
Zugehörigkeit: 
MPIM
Datum: 
Mon, 26/09/2022 - 15:30 - 15:40
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Hybrid talk.
Contact for details: Tobias Barthel, Viktoriya Ozornova, Aru Ray, Peter Teichner.

Introductory talk.

tba

Posted in
Speaker: 
Marko Berghoff
Zugehörigkeit: 
HU Berlin
Datum: 
Die, 29/11/2022 - 14:00 - 15:00

Connection link: https://hu-berlin.zoom.us/j/61686623112
Contact: Gaetan Borot (gaetan.borot@hu-berlin.de)

Local wild mapping class groups

Posted in
Speaker: 
Gabriele Rembado
Zugehörigkeit: 
Gabriele Rembado (HCM Bonn)
Datum: 
Die, 22/11/2022 - 14:00 - 15:00
Location: 
MPIM Lecture Hall

Connection link: https://hu-berlin.zoom.us/j/61686623112
Contact: Gaetan Borot (gaetan.borot@hu-berlin.de)

tba

Posted in
Speaker: 
Francisco Arana-Herrera
Zugehörigkeit: 
University of Maryland
Datum: 
Die, 15/11/2022 - 14:00 - 15:00

Connection link: https://hu-berlin.zoom.us/j/61686623112
Contact: Gaetan Borot (gaetan.borot@hu-berlin.de)

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

Posted in
Speaker: 
Camilo Arias Abad
Zugehörigkeit: 
Universidad Nacional de Colombia / MPIM
Datum: 
Mit, 21/09/2022 - 10:30 - 12:00
Location: 
MPIM Lecture Hall

For a Lie group $G$,  we consider the space of smooth singular chains $C(G)$, which is a differential graded Hopf algebra.  We show that the category of sufficiently local modules over $C(G)$ can be described infinitesimally, as the category of representations of a dg-Lie algebra which is universal for the Cartan relations. If $G$ is compact and simply connected, the equivalence of categories can be promoted to an A-infinity equivalence of dg-categories.

Solutions of the Yang-Baxter equation: groups, algebras and braces

Posted in
Speaker: 
Arne van Antwerpen
Zugehörigkeit: 
Vrije Universiteit Brussels
Datum: 
Die, 08/11/2022 - 14:00 - 15:00

Connection link: https://hu-berlin.zoom.us/j/61686623112
Contact: Gaetan Borot (gaetan.borot@hu-berlin.de)

 

Bounded generation of Chevalley groups in the function field case [Note the change of time!]

Posted in
Speaker: 
Boris Kunyavski
Zugehörigkeit: 
Bar-Ilan University/MPIM
Datum: 
Mit, 28/09/2022 - 16:30 - 17:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

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


We shall discuss the problem of bounded generation of Chevalley groups with respect to elementary unipotents or commutators in the case where the base ring is Dedekind of arithmetic type. The new results were obtained in the case where the base ring is the ring of polynomials or Laurent polynomials over a finite field. In the talk, the focus is on arithmetic ingredients of the proof and on arithmetic problems arising in eventual generalizations.

The talk is based on joint work with E. Plotkin and N. Vavilov.

Universal operations on the Tate-Hochschild complex [Algebra, Geom. Phys. Seminar]

Posted in
Speaker: 
Ralph Kaufmann
Zugehörigkeit: 
Purdue University
Datum: 
Die, 18/10/2022 - 14:00 - 15:00
Location: 
Online talk

Online talk only.
Connection link: https://hu-berlin.zoom.us/j/61686623112
Contact: Gaetan Borot (gaetan.borot@hu-berlin.de)

 

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