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

IMPRS Thementag

Posted in
Speaker: 
Short lectures by our new IMPRS students: Janina Bernardy, Chenji Fu, Gilles Felber, and Andrea Monti
Organiser(s): 
Christian Kaiser
Datum: 
Mon, 29/04/2024 - 16:30 - 18:45
Location: 
MPIM Lecture Hall

IMPRS Thementag

Posted in
Speaker: 
Short lectures by our new IMPRS students: Stepan Aleksandrov, Igor Spiridonov, Johannes Lin, Qi Zhu, Moritz Hartlieb
Organiser(s): 
Christian Kaiser
Datum: 
Mon, 23/10/2023 - 16:30 - 18:45
Location: 
MPIM Lecture Hall

D-modules on the Fargues-Fontaine curve

Posted in
Speaker: 
Guido Bosco
Zugehörigkeit: 
MPIM
Datum: 
Fre, 26/04/2024 - 14:05 - 16:00
Location: 
MPIM Lecture Hall

A dichotomy in dimension four

Posted in
Speaker: 
Inanc Baykur
Zugehörigkeit: 
University of Massachusetts-Amherst
Datum: 
Die, 23/04/2024 - 11:45 - 13:00
Location: 
MPIM Lecture Hall

Does every four-manifold admit either no smooth structure or infinitely many of them? I'll report on recent work, joint with A. Stipsicz and Z. Szabó, addressing this question for four-manifolds with finite cyclic fundamental groups. A bonus discussion may feature fake projective planes in the context of yet another dichotomy.

tba

Posted in
Speaker: 
Stefano Riolo
Zugehörigkeit: 
Università di Bologna
Datum: 
Die, 18/06/2024 - 11:45 - 12:45
Location: 
MPIM Lecture Hall

Group rings and hyperbolic geometry

Posted in
Speaker: 
Grigori Avramidi
Zugehörigkeit: 
MPIM
Datum: 
Mon, 22/04/2024 - 14:00 - 15:00
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

In the 60's Cohn showed that all ideals in the group algebra of a free group are free. Bass and Wall used this result to show that all two-dimensional complexes with free fundamental groups are standard: they are all homotopy equivalent to wedges of circles and 2-spheres.

Models for Differentiable Stack Cohomology - A journey via equivariant cohomology and Lie groupoids

Posted in
Speaker: 
Annika Tarnowsky
Zugehörigkeit: 
MPIM/Universität Bonn
Datum: 
Die, 23/04/2024 - 10:00 - 11:30
Location: 
MPIM Lecture Hall

Analytic Rings

Posted in
Speaker: 
Semen Slobodianiuk
Zugehörigkeit: 
Universität Bonn
Datum: 
Die, 23/04/2024 - 14:00 - 16:00
Location: 
MPIM Lecture Hall

Analytic prismatization

Posted in
Speaker: 
Peter Scholze
Zugehörigkeit: 
MPIM
Datum: 
Don, 25/04/2024 - 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPI-Oberseminar

MPI-Oberseminar jointly with  "Arithmetic Geometry, A conference in Honor of Hèléne Esnault on the occasion of Her 70th Birthday" at IHES:
https://indico.math.cnrs.fr/event/11114/
 

Registration

Posted in
Datum: 
Don, 02/05/2024 - 13:00 - 13:45
Location: 
MPIM Lecture Hall

Hecke eigen-functions for curves over local non-archimedian fields

Posted in
Speaker: 
Alexander Braverman
Zugehörigkeit: 
University of Toronto
Datum: 
Die, 23/04/2024 - 16:30 - 17:30
Location: 
MPIM Lecture Hall
Parent event: 
Extra talk

We give a survey of some recent constrictions and results concerning Hecke operators for the moduli space of G-bundles on a smooth projective curve X defined over a local non-archimedian field F (possibly with level structures). These operators are somewhat analogous to the usual Hecke operators in the case when F is a finite field but describing their common eigen-values is a much more difficult task. We'll discuss on what space the Hecke operators act, formulate some general conjectures about eigen-functions and consider some examples.

Classical real local Langlands for GL_2(R)

Posted in
Speaker: 
Stefan Dawydiak
Zugehörigkeit: 
Universität Bonn
Datum: 
Die, 16/04/2024 - 14:00 - 16:00
Location: 
MPIM Lecture Hall

Computing differentiable stack cohomology via multiplicative Ehresmann connections

Posted in
Speaker: 
Annika Tarnowsky
Zugehörigkeit: 
MPIM
Datum: 
Mit, 17/04/2024 - 10:30 - 12:00
Location: 
MPIM Lecture Hall

tba

Posted in
Speaker: 
Ramesh Sreekantan
Zugehörigkeit: 
Indian Statistical Institute (SMU)
Datum: 
Mit, 08/05/2024 - 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

Lifting differential equations

Posted in
Speaker: 
Vasily Golyshev
Zugehörigkeit: 
ICTP Trieste
Datum: 
Mit, 24/04/2024 - 14:30 - 15:40
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

I will start by discussing 'frequently occurring congruences' and the related notion of congruence sheaves.  I will then introduce
a method to construct lifts of differential equations by using generalized Taylor's formula in a systematic way.

The talk is based on joint work with Ilia Gaiur.

 

tba *Please note location!*[Bonn symplectic geometry seminar]

Posted in
Speaker: 
Umut Varolgunes
Zugehörigkeit: 
Koç University
Datum: 
Fre, 17/05/2024 - 13:00 - 14:00
Location: 
MPIM Conference Room

Stability problems and differential graded Lie algebras

Posted in
Speaker: 
Karandeep Jandu Singh
Zugehörigkeit: 
MPIM Bonn
Datum: 
Don, 18/04/2024 - 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPI-Oberseminar

Stability problems appear in various forms throughout geometry and algebra. In differential geometry, given a vector field on a manifold that vanishes in a point, one can ask when nearby vector fields also vanish in a point. In algebra, given a Lie algebra and a subalgebra, one can ask when all deformations of the ambient Lie algebra also admit a Lie subalgebra of the same dimension. I will show that both questions are instances of a general question about differential graded Lie algebras.

Proper sheaves on Bun_G

Posted in
Speaker: 
Tim Kuppel
Zugehörigkeit: 
Universität Bonn
Datum: 
Die, 16/04/2024 - 10:00 - 11:30
Location: 
MPIM Lecture Hall

IMPRS seminar on various topics: single talk

Posted in
Datum: 
Die, 16/04/2024 - 10:00 - Die, 06/08/2024 - 11:30
Location: 
MPIM Lecture Hall

On the distribution of supersingular primes for abelian surfaces

Posted in
Speaker: 
Tian Wang
Zugehörigkeit: 
MPIM Bonn
Datum: 
Mit, 17/04/2024 - 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

In 1976, Lang and Trotter conjectured the asymptotic growth for the number of primes p up to x for which the reduction of a non-CM elliptic curve E/Q at p is supersingular. Though the conjecture is still open, we now have unconditional upper and lower bounds thanks to the work of several mathematicians. However, less has been studied for the distribution of supersingular primes for abelian surfaces (even conjecturally).

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