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

d-invariants of branched double covers of links

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Speaker: 
Biji Wong
Affiliation: 
MPIM
Date: 
Thu, 2021-12-09 15:00 - 16:00
Parent event: 
MPI-Oberseminar

To a 3-manifold that takes the form of a rational homology 3-sphere, one can associate d-invariants, certain numerical invariants coming from Heegaard Floer theory. The d-invariant is related to the classical Casson-Walker invariant, and has applications to 4-manifold topology. In this talk, we will discuss d-invariants of double covers of the 3-sphere branched along links that come from plumbing graphs. We will give some new partial computations and a conjecture. Part of this is joint with Marco Marengon.

L^2-invariants, homology growth and embedding theory, II

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Speaker: 
Grigori Avramidi
Affiliation: 
MPIM
Date: 
Tue, 2021-12-07 10:15 - 11:45
Parent event: 
IMPRS Minicourse
For a closed manifold M with contractible universal cover, the Singer conjecture predicts that the L^2-Betti numbers of M are concentrated in the middle dimension. In this minicourse I will introduce L^2-Betti numbers and discuss the history of Singer's conjecture, its reinterpretation as a question about rational homology growth in finite covers, and how variations involving torsion and F_p homology growth can be addressed with the help of some very classical embedding theory.

 

Periods of Meromorphic Modular Forms

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Speaker: 
Axel Koelschbach
Affiliation: 
MPIM
Date: 
Mon, 2021-12-06 10:15 - 11:45
Parent event: 
IMPRS seminar on various topics: Period Polynomials and Meromorphic Modular Forms

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

Unipotent homotopy group schemes, II

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Speaker: 
Emanuel Reinecke
Affiliation: 
MPIM
Date: 
Thu, 2021-12-09 12:00 - 14:00
Parent event: 
Arbeitsgemeinschaft Arithmetische Geometrie

For zoom details please contact: Peter Scholze (scholze@mpim-bonn.mpg.de)

Motivic tensor-triangular geometry, II

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Speaker: 
Scott Balchin
Affiliation: 
MPIM
Date: 
Mon, 2021-12-06 15:00 - 16:00
Parent event: 
Mini series "Motivic tensor-triangular geometry"
Parent event: 
MPIM Topology Seminar

This talk will recast the tt-classification problem through the lens of tt-geometry. In particular, we will explore the existence of a topological space—the Balmer spectrum—of a tensor-triangulated category, which classifies the tt-ideals through a universal support theory. We will go on to explore how this tt-geometry formalism can lead to powerful results in examples of interest.

Zoom meeting ID: 916 5855 1117
Contact: Barthel, Ozornova, Ray, Teichner

Bloch-Beilinson conjectures for Hecke characters and Eisenstein cohomologyof Picard surfaces

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Speaker: 
Mattia Cavicchi
Affiliation: 
Université de Strasbourg
Date: 
Wed, 2021-12-08 14:30 - 15:30
Parent event: 
Number theory lunch seminar

Zoom ID: 919 6497 4060
For password contact Pieter Moree (moree@mpim-bonn.mpg.de)

L^2-invariants, homology growth and embedding theory

Posted in
Speaker: 
Grigory Avramidi
Affiliation: 
MPIM
Date: 
Tue, 2021-11-30 10:15 - 11:45
Parent event: 
IMPRS Minicourse
For zoom details contact Christian Kaiser (kaiser@mpim-bonn.mpg.de)
 
For a closed manifold M with contractible universal cover, the Singer conjecture predicts that the L^2-Betti numbers of M are concentrated in the middle dimension.

Unipotent homotopy group schemes, I

Posted in
Speaker: 
Emanuel Reinecke
Affiliation: 
MPIM
Date: 
Thu, 2021-12-02 12:00 - 14:00
Parent event: 
Arbeitsgemeinschaft Arithmetische Geometrie

For zoom details please contact: Peter Scholze (scholze@mpim-bonn.mpg.de)

The Lambda algebra and a motivic analogue

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Speaker: 
Dominic Culver
Affiliation: 
MPIM
Date: 
Thu, 2021-12-02 15:00 - 16:00
Parent event: 
MPI-Oberseminar

Meeting ID: 931 7291 0947
For passcode please contact Christian Kaiser (kaiser@mpim....)
 

Period Polynomials and the Eichler-Shimura Isomorphism

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Speaker: 
Kilian Boenisch
Affiliation: 
Universität Bonn/MPIM
Date: 
Mon, 2021-11-29 10:15 - 11:45
Parent event: 
IMPRS seminar on various topics: Period Polynomials and Meromorphic Modular Forms

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

Gauge transformations of multisymplectic manifolds and L-infinity observables

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Speaker: 
Antonio Miti
Affiliation: 
MPIM
Date: 
Wed, 2021-12-15 10:30 - 12:00
Location: 
MPIM Lecture Hall
Parent event: 
Higher Differential Geometry Seminar

Multisimplectic manifolds are a straightforward generalization of symplectic manifolds where closed non-degenerate k-forms are considered in place of 2-forms. A natural theme that arises when dealing with both symplectic and multisymplectic structures is to investigate the relationship between gauge-related multisymplectic manifolds, i.e. endowed with different multisymplectic forms lying in the same cohomology class. This talk will focus on the L-infinity algebras of observables associated with a pair of gauge-related multisymplectic manifolds.

Integral representations of L-functions and spectral identities

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Speaker: 
Ramon Moreira Nunes
Affiliation: 
MPIM
Date: 
Wed, 2021-12-01 14:30 - 15:30
Parent event: 
Number theory lunch seminar

Zoom ID: 919 6497 4060
For password please contact Pieter Moree (moree@mpim-bonn.mpg.de)

Poisson cohomology: an overview, with focus on linear Poisson structures

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Speaker: 
Florian Zeiser
Affiliation: 
MPIM
Date: 
Wed, 2021-12-01 10:30 - 12:00
Location: 
MPIM Lecture Hall
Parent event: 
Higher Differential Geometry Seminar

The talk is online:
Zoom ID: 547 147 1640
For the password, send an email to blohmann@mpim-bonn.mpg.de.

 

Modular bootstrap, Segal axioms and resolution of Liouville field theory

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Speaker: 
Colin Guillarmou
Affiliation: 
Orsay
Date: 
Tue, 2022-01-04 13:45 - 15:30
Parent event: 
Seminar on Algebra, Geometry and Physics/joint with HU Berlin

https://hu-berlin.zoom.us/j/61686623112
Contact: Gaetan Borot

Motivic Tensor-Triangular Geometry, III

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Speaker: 
Paul Balmer
Affiliation: 
UCLA
Date: 
Mon, 2021-12-13 15:00 - 16:00
Parent event: 
Mini series "Motivic tensor-triangular geometry"
Parent event: 
MPIM Topology Seminar

For zoom details please contact: Tobias Barthel, Viktoriya Ozornova, Aru Ray, Peter Teichner.

Almost coherent sheaves and mod-p Poincare Duality in p-adic analytic geometry, II

Posted in
Speaker: 
Bogdan Zavyalov
Affiliation: 
MPIM
Date: 
Thu, 2021-11-25 12:00 - 14:00
Parent event: 
Arbeitsgemeinschaft Arithmetische Geometrie

For zoom details please contact: Peter Scholze (scholze@mpim-bonn.mpg.de)

Singular moduli and S-units

Posted in
Speaker: 
Francesco Campagna
Affiliation: 
MPIM
Date: 
Wed, 2021-11-24 14:30 - 15:30
Parent event: 
Number theory lunch seminar

Zoom ID: 919 6497 4060
For password please contact Pieter Moree (moree@mpim-bonn.mpg.de)

Susy field theory and generalized cohomology

Posted in
Speaker: 
Peter Teichner
Affiliation: 
MPIM
Date: 
Mon, 2021-11-22 15:00 - 16:00
Parent event: 
MPIM Topology Seminar

Zoom meeting ID: 916 5855 1117
Contact: Barthel, Ozornova, Ray, Teichner

Cohomology of rigid analytic spaces

Posted in
Speaker: 
Haoyang Guo
Affiliation: 
MPIM
Date: 
Thu, 2021-11-25 15:00 - 16:00
Parent event: 
MPI-Oberseminar

This talk considers the cohomology theories of rigid analytic spaces, with a focus on spaces that might be singular. We will first recall the classical cohomology theories in complex algebraic geometry, including singular cohomology and various de Rham cohomology theories, together with their relations. We then generalize them to their p-adic counterparts using the simplicial method and the resolution of singularities. We will see that cohomology theories in the p-adic world enjoy many good properties as in the complex geometry, even when the space admits singularities.

Manin's Period Theorem

Posted in
Speaker: 
Gilles Felber
Affiliation: 
Universität Bonn/MPIM
Date: 
Mon, 2021-11-22 10:15 - 11:45
Parent event: 
IMPRS seminar on various topics: Period Polynomials and Meromorphic Modular Forms

Meeting-ID: 994 2805 4844

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

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