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Events

Conferences, seminars, talks and other events at the MPI for Mathematics

Upcoming conferences & activities

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Workshop on 4-manifolds, September 16 - 20, 2019

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Organiser(s): 
David Gay, Jeffrey Meier, Arunima Ray, and Peter Teichner
Date: 
Mon, 2019-09-16 10:00 - Fri, 2019-09-20 16:00
Location: 
MPIM Lecture Hall

Workshop on 4-manifolds, September 16 - 20, 2019

 

Organizers

David Gay (University of Georgia/MPIM Bonn)
Jeffrey Meier (University of Georgia)
Arunima Ray (MPIM Bonn)
Peter Teichner (MPIM Bonn)
 

Confirmed Speakers:

 
Michael Freedman (Station Q & UC Santa Barbara)
David Gabai (Princeton)
Robert Gompf (UT Austin)
Sergei Gukov (Caltech)
András Juhász (Oxford)
Du Pei (Caltech)
Lisa Piccirillo (UT Austin)
Juanita Pinzón-Caicedo (North Carolina State University/MPIM Bonn)
Mark Powell (Durham)
Rob Schneiderman (CUNY)
Hannah Schwartz (Bryn Mawr/MPIM Bonn)
Laura Starkston (UC Davis)
András Stipsicz (Alfred Renyi)
Alex Zupan (University of Nebraska Lincoln)

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.

"What is...?" seminar

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Organiser(s): 
Charles Fougeron, Diego Izquierdo
Date: 
Fri, 2018-10-26 13:00 - Fri, 2019-08-30 16:30
Location: 
MPIM Lecture Hall

Homotopy versus Isotopy: Spheres in 5-manifolds, I

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Speaker: 
Peter Teichner
Affiliation: 
MPIM
Date: 
Mon, 2019-08-26 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Homotopy versus Isotopy: Spheres in 5-manifolds, II

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Speaker: 
Peter Teichner
Affiliation: 
MPIM
Date: 
Mon, 2019-08-26 16:30 - 17:30
Location: 
MPIM Lecture Hall
Parent event: 
MPIM Topology Seminar

Rationality of Fano 3-folds over nonclosed fields

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Speaker: 
Yuri Prokhorov
Affiliation: 
Steklov Mathematical Institute, Moscow/MPIM
Date: 
Tue, 2019-08-27 14:00 - 15:00
Location: 
MPIM Lecture Hall

The rationality problem for smooth Fano threefolds over algebraically closed fields is basically solved.
In this talk I will discuss rationality  of forms of these  Fanos over nonclosed fields of characteristic 0.
I will concentrate on the case where the  Picard number  equals 1.

The talk is based on joint work with Alexander Kuznetsov (in progress).

An introduction to quantum computing and quantum error correction (with a connection to Howe duality)

Posted in
Speaker: 
David Gross
Affiliation: 
Universität zu Köln
Date: 
Tue, 2019-08-27 15:00 - 16:00
Location: 
MPIM Lecture Hall

Recently, Gurevitch and Howe have associated a notion of "rank" to representations of the symplectic group, and showed that "highest rank" representations satisfy a form of Howe duality over finite fields (c.f. talk on the 20th). Montealegre-Mora and me then realized that the rank-deficient reps occurring in this context can be characterized in terms of certain quantum error correcting codes. The purpose of this talk is to explain the background of this development, i.e. why physicists care about these objects in the first place.

Chebyshev’s bias for products of k primes and Greg Martin’s conjecture

Posted in
Speaker: 
Xianchang Meng
Affiliation: 
Universität Göttingen/MPIM
Date: 
Wed, 2019-08-28 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

For any $k\geq 1$, we study the distribution of the difference between the number of integers $n\leq x$ with $\omega(n)=k$  or $\Omega(n)=k$ in two different arithmetic progressions, where $\omega(n)$ is the number of distinct prime factors of $n$ and $\Omega(n)$ is the number of prime factors of $n$ counted with multiplicity . Under some reasonable assumptions, we show that, if $k$ is odd, the integers with $\Omega(n)=k$ have preference for quadratic non-residue classes; and if $k$ is even, such integers have preference for quadratic residue classes.

Puzzles about trisections of 4-manifolds

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Speaker: 
David Gay
Affiliation: 
University of Georgia/MPIM
Date: 
Thu, 2019-08-29 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
Colloquium
Parent event: 
MPI-Oberseminar

A trisection of a smooth 4-manifold is a very natural kind of decomposition into three elementary pieces which I will describe. Trisections are a natural 4-dimensional analogue of Heegaard splittings of 3-manifolds, a class of decompositions into two pieces that have yielded tremendous insight into 3-dimensional topology, so the philosophy is that trisections should give a way to port 3-dimensional techniques, questions and results to dimension four.

Rational points on quartic del Pezzo surfaces with a conic bundle structure

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Speaker: 
Vladimir Mitankin
Affiliation: 
MPIM
Date: 
Tue, 2019-09-03 14:00 - 15:00
Location: 
MPIM Lecture Hall

There are three possibilities for the quotient of the Brauer group of X modulo constants when X is a del Pezzo surface of degree four over the rational numbers . In this talk we will explain how often each of them occurs when X ranges across a family of quartic del Pezzo surfaces equipped with a conic bundle structure. We will also give an explicit description of the generators of this quotient which allows us to calculate the frequency of such surfaces violating the Hasse principle. This talk is based on a joint work in progress with Cecília Salgado.

tba

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Speaker: 
Yingkun Li
Affiliation: 
TU Darmstadt
Date: 
Wed, 2019-09-04 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

Mathematical events in Bonn

Bonn Mathematics Calendar

All mathematical events in Bonn are listed in the Bonn Mathematics Calendar. For directions see the map.

University Calendar

All lectures and courses at Bonn University can be found in the university calendar.

 

Recurring seminars, series and courses

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Detailed list of recurring seminars, series of talks, and courses or lectures comprising multiple talks. For an overview see also the calendar.

Friedrich Hirzebruch Lecture

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Location: 
University Club Bonn

The annual Friedrich Hirzebruch Lecture is a series of lectures started in 2007 on the occasion of the 80th birthday of Prof. Friedrich Hirzebruch. The lectures address a general audience and aim at illustrating the relation between mathematics and art, society and other fields.

MPI-Oberseminar

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Organiser(s): 
C. Kaiser
Date: 
Thu, 2013-01-31 15:00 - Thu, 2026-12-31 16:00
Location: 
MPIM Lecture Hall

The Oberseminar is a very long running seminar at MPI (‘Ober‘ standing for 'upper'). Its idea is that the guests of the MPI speak in this seminar (hopefully early in their stay) and get the chance to explain their work to the other guests.

Topics in Topology

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Location: 
MPIM Lecture Hall

Promotionskolloquium

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IMPRS Minicourse

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Organiser(s): 
C. Kaiser

Representation theory learning seminar

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Organiser(s): 
Hankyung Ko, Emily Norton, Thorsten Heidersdorf

Extra talk

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This is a collection of extra talks that don't fit into the other series.

Seminar on Algebra, Geometry and Physics

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Organiser(s): 
Yuri Manin
Date: 
Fri, 2010-01-01 14:00 - Tue, 2024-12-31 15:00
Location: 
MPIM Lecture Hall

Seminar Algebraic Geometry (SAG)

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Organiser(s): 
D. Huybrechts
Date: 
Thu, 2011-01-06 10:30 - Thu, 2026-12-31 12:00
Location: 
MPIM Lecture Hall

Higher Differential Geometry Seminar

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Organiser(s): 
Christian Blohmann
Date: 
Wed, 2012-04-18 10:30 - Fri, 2021-04-30 12:00
Location: 
MPIM Lecture Hall

Archived Events

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To narrow the list of events displayed please select year and event type or fill the search fields, then press Apply.

MPI-Oberseminar

Posted in
Organiser(s): 
C. Kaiser
Date: 
Thu, 2013-01-31 15:00 - Thu, 2026-12-31 16:00
Location: 
MPIM Lecture Hall

The Oberseminar is a very long running seminar at MPI (‘Ober‘ standing for 'upper'). Its idea is that the guests of the MPI speak in this seminar (hopefully early in their stay) and get the chance to explain their work to the other guests.

Friedrich Hirzebruch Lecture

Posted in
Location: 
University Club Bonn

The annual Friedrich Hirzebruch Lecture is a series of lectures started in 2007 on the occasion of the 80th birthday of Prof. Friedrich Hirzebruch. The lectures address a general audience and aim at illustrating the relation between mathematics and art, society and other fields.

"Pentagramma Mirificum". Hirzebruch lecture by Sergey Fomin on Friday, November 8, University Club Bonn

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Speaker: 
Sergey Fomin
Affiliation: 
University of Michigan
Date: 
Fri, 2019-11-08 18:00 - 19:00
Location: 
University Club Bonn

Pentagramma Mirificum (the miraculous pentagram) is a beautiful geometric construction studied by Napier and Gauss. Its algebraic description yields the simplest instance of cluster transformations, a remarkable family of recurrences which arise in diverse mathematical contexts, from representation theory and enumerative combinatorics to theoretical physics and classical geometry (Euclidean, spherical, or hyperbolic).

Perturbing an isoradial triangulation

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Speaker: 
Jeanne Scott
Affiliation: 
Universidad de los Andes
Date: 
Tue, 2019-09-24 14:00 - 15:00
Location: 
MPIM Lecture Hall

The theory of random Delaunay triangulations of the plane has been proposed by
David-Eynard and others as a discrete model for 2-dimensional quantum gravity: In this model
the role of a continuous metric is played by a Delaunay triangulation while flat metrics
correspond to isoradial triangulations (on which one can define a theory of discrete analyticity).
Like the continuous case, the partition function for this discrete theory is given by a suitably
normalized determinant of a Beltrami-Laplace operator which varies with the choice of

Workshop on 4-manifolds, September 16 - 20, 2019

Posted in
Organiser(s): 
David Gay, Jeffrey Meier, Arunima Ray, and Peter Teichner
Date: 
Mon, 2019-09-16 10:00 - Fri, 2019-09-20 16:00
Location: 
MPIM Lecture Hall

Workshop on 4-manifolds, September 16 - 20, 2019

 

Organizers

David Gay (University of Georgia/MPIM Bonn)
Jeffrey Meier (University of Georgia)
Arunima Ray (MPIM Bonn)
Peter Teichner (MPIM Bonn)
 

Confirmed Speakers:

 
Michael Freedman (Station Q & UC Santa Barbara)
David Gabai (Princeton)
Robert Gompf (UT Austin)
Sergei Gukov (Caltech)
András Juhász (Oxford)
Du Pei (Caltech)
Lisa Piccirillo (UT Austin)
Juanita Pinzón-Caicedo (North Carolina State University/MPIM Bonn)
Mark Powell (Durham)
Rob Schneiderman (CUNY)
Hannah Schwartz (Bryn Mawr/MPIM Bonn)
Laura Starkston (UC Davis)
András Stipsicz (Alfred Renyi)
Alex Zupan (University of Nebraska Lincoln)

tba

Posted in
Speaker: 
Yingkun Li
Affiliation: 
TU Darmstadt
Date: 
Wed, 2019-09-04 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

Rational points on quartic del Pezzo surfaces with a conic bundle structure

Posted in
Speaker: 
Vladimir Mitankin
Affiliation: 
MPIM
Date: 
Tue, 2019-09-03 14:00 - 15:00
Location: 
MPIM Lecture Hall

There are three possibilities for the quotient of the Brauer group of X modulo constants when X is a del Pezzo surface of degree four over the rational numbers . In this talk we will explain how often each of them occurs when X ranges across a family of quartic del Pezzo surfaces equipped with a conic bundle structure. We will also give an explicit description of the generators of this quotient which allows us to calculate the frequency of such surfaces violating the Hasse principle. This talk is based on a joint work in progress with Cecília Salgado.

Puzzles about trisections of 4-manifolds

Posted in
Speaker: 
David Gay
Affiliation: 
University of Georgia/MPIM
Date: 
Thu, 2019-08-29 15:00 - 16:00
Location: 
MPIM Lecture Hall
Parent event: 
Colloquium
Parent event: 
MPI-Oberseminar

A trisection of a smooth 4-manifold is a very natural kind of decomposition into three elementary pieces which I will describe. Trisections are a natural 4-dimensional analogue of Heegaard splittings of 3-manifolds, a class of decompositions into two pieces that have yielded tremendous insight into 3-dimensional topology, so the philosophy is that trisections should give a way to port 3-dimensional techniques, questions and results to dimension four.

Chebyshev’s bias for products of k primes and Greg Martin’s conjecture

Posted in
Speaker: 
Xianchang Meng
Affiliation: 
Universität Göttingen/MPIM
Date: 
Wed, 2019-08-28 14:30 - 15:30
Location: 
MPIM Lecture Hall
Parent event: 
Number theory lunch seminar

For any $k\geq 1$, we study the distribution of the difference between the number of integers $n\leq x$ with $\omega(n)=k$  or $\Omega(n)=k$ in two different arithmetic progressions, where $\omega(n)$ is the number of distinct prime factors of $n$ and $\Omega(n)$ is the number of prime factors of $n$ counted with multiplicity . Under some reasonable assumptions, we show that, if $k$ is odd, the integers with $\Omega(n)=k$ have preference for quadratic non-residue classes; and if $k$ is even, such integers have preference for quadratic residue classes.

An introduction to quantum computing and quantum error correction (with a connection to Howe duality)

Posted in
Speaker: 
David Gross
Affiliation: 
Universität zu Köln
Date: 
Tue, 2019-08-27 15:00 - 16:00
Location: 
MPIM Lecture Hall

Recently, Gurevitch and Howe have associated a notion of "rank" to representations of the symplectic group, and showed that "highest rank" representations satisfy a form of Howe duality over finite fields (c.f. talk on the 20th). Montealegre-Mora and me then realized that the rank-deficient reps occurring in this context can be characterized in terms of certain quantum error correcting codes. The purpose of this talk is to explain the background of this development, i.e. why physicists care about these objects in the first place.

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