## Friedrich Hirzebruch Lecture

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

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.

This often leads to further mathematical interaction, and in any case it is very interesting to know what one's colleagues are working on.

This implies two things:

- When you speak at the Oberseminar you should try to make sure that your talk is understandable and interesting to everyone, not just to the people in the same field. (We have many specialized seminars where you can present your work at a more technical level.)
- Please always attend the Oberseminar, even if the title of the talk seems technical, because you know that the speaker is going to do a good job. The only reason for absence is that the talk is in your field and thus will be too easy for you.

We hope to see you at the Oberseminar!

Christian Kaiser (organizer)

The directors:

Prof. Ballmann (em.)

Prof. Faltings

Prof. Gaitsgory

Prof. Harder (em.)

Prof. Hirzebruch †

Prof. Manin (em.)

Prof. Scholze

Prof. Teichner

Prof. Zagier (em.)

**Upcoming talks**

### Don, 25 Apr 2024

**Past talks**

For the abstracts click on the titles or see the list of abstracts.

### Don, 18 Apr 2024

### Don, 11 Apr 2024

### Don, 28 Mär 2024

### Don, 21 Mär 2024

### Don, 14 Mär 2024

### Don, 07 Mär 2024

### Don, 29 Feb 2024

### Don, 22 Feb 2024

### Don, 15 Feb 2024

### Don, 01 Feb 2024

### Don, 25 Jan 2024

### Don, 18 Jan 2024

### Don, 11 Jan 2024

### Don, 14 Dez 2023

### Don, 07 Dez 2023

### Don, 30 Nov 2023

### Don, 23 Nov 2023

### Don, 16 Nov 2023

### Don, 09 Nov 2023

### Don, 02 Nov 2023

### Don, 26 Okt 2023

### Don, 19 Okt 2023

### Don, 12 Okt 2023

### Don, 28 Sep 2023

### Don, 21 Sep 2023

### Don, 07 Sep 2023

### Don, 31 Aug 2023

### Don, 24 Aug 2023

### Don, 17 Aug 2023

### Don, 10 Aug 2023

### Don, 03 Aug 2023

### Don, 27 Jul 2023

### Don, 20 Jul 2023

### Don, 13 Jul 2023

### Don, 06 Jul 2023

### Don, 29 Jun 2023

### Don, 15 Jun 2023

### Don, 01 Jun 2023

### Don, 25 Mai 2023

### Don, 11 Mai 2023

### Don, 04 Mai 2023

### Don, 27 Apr 2023

### Don, 20 Apr 2023

### Don, 13 Apr 2023

### Don, 06 Apr 2023

### Don, 23 Mär 2023

### Don, 16 Mär 2023

### Don, 02 Mär 2023

### Don, 23 Feb 2023

### Don, 09 Feb 2023

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## Reading seminar on the unstable Adams spectral sequence

## Oberseminar Arithmetische Geometrie und Darstellungstheorie

## ARGOS (Arithmetische Geometrie Oberseminar)

## Seminar Circle method for Diophantine equations

We are organizing a seminar that aims to offer an introduction to the circle method. Initially developed by Hardy, Littlewood, and Ramanujan, the circle method has been successfully applied to many problems in number theory, including Waring’s problem, Goldbach’s weak conjecture, and estimating the number of partitions. We will follow Davenport's lecture notes* that explains the Hardy-Littlewood circle method with a minimum of fuss by looking at its applications to Waring's problem.

We plan to cover the first ten sections of * and we will meet on Mondays starting from February 19 at 2:00-4:00 pm in the seminar room. All who are interested in this topic are welcome to join!

(*Analytic methods for Diophantine equations and Diophantine inequalities. The University of Michigan, Fall Semester, 1962)

## Abstract Homotopy Theory Seminar

## MPIM Math-Phys Seminar

A seminar about different topics in Mathematical Physics, broadly around Quantum Field Theory, Algebraic Topology and Differential Geometry. Our meetings are hosted by an assigned speaker, who gives an informal introduction to his topic. Alongside, we will have questions from the audience, which typically lead to a lively discussion.

Seminar-Webseite: https://davidprinz.org/seminar/

## IMPRS seminar on various topics: Mostow rigidity

## IMPRS seminar on various topics: Single talk

## IMPRS seminar on various topics: Schur–Weyl duality

## Infinty: Introducing New Faces in Number TheorY

Short presentations of new arrivals at MPIM working in number theory.

## Seminar "Arithmetic Geometry and Representation Theory"

## Bonn symplectic geometry seminar

## Exponential Sum Reading Seminar

We are excited to announce a semester-long reading seminar on the exponential sum over finite fields. Throughout the seminar, participants will delve into the interaction of analytic number theory and arithmetic geometry. Specifically, we will learn Stepanov's “elementary” method to prove Weil’s Conjecture for curves over finite fields. We kindly invite all Ph.D students and postdocs who are interested in this topic.

The main reference is “Equations over Finite Fields: An Elementary Approach” by Schmidt. We will try to cover Chapter I, II, IV of the book. More details will be discussed during the organization meeting.

## Seminar on Abstract Homotopy Theory

## IMPRS seminar on various topics: Farrel–Jones-Conjecture

## IMPRS seminar on various topics: Cerf theory

## Student Seminar on Derived Geometry

## IMPRS seminar on various topics: Graded geometry

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

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