Time/Date:
See announcements below.
Content:
Various topics related to model theory are discussed, including interactions with algebra, geometry and logic.
Organizers:

## Winter 2020/2021

The regular programme for Winter 2020/2021 can be found at Seminar Modelltheorie.

## Summer 2020

During Corona time, we may have some online talks.

### Talks

 Date Speaker Title Tuesday 14.4.2020 14:30-15:30 Link to the meeting; password: How does one call a sentence that may have free variables? Immi $p$-adic integration is optimal Abstract Hrushovski and Kazhdan define motivic integration as a "universal" integration theory in algebraically closed valued fields. If one does a similar construction in $\mathbb{Q}_p$, then one just gets back usual $p$-adic integration (meaning that in some sense, $p$-adic integration is already the best possible integration theory on $\mathbb{Q}_p$). This can also be considered as a positive answer to the $p$-adic version of a question by Kontsevich-Zagier about equations between integrals. In my talk, I will explain these results. This is a joint work with Raf Cluckers.

## 2019 - 2020

Together with the group at Münster, we sometimes host the Gemeinsames Seminar Algebra und Modelltheorie.

### Talks

 Date Speaker Title NEW DATE: Friday 6.3.2020 Guest lecture Time: 10:30 Room: 2522.03.73 Tobias Kaiser (Passau) Logarithms, constructible functions and integration on non-archimedean models of the theory of the real field with restricted analytic functions with value group of finite archimedean rank. Abstract

## Summer 2019

The regular programme for Summer 2019 is Applications of Model Theory to Partial Differential Equations.

## Winter 2018/2019

### Talks

 Date Speaker Title Friday 16.11.18 Guest lecture Time: 14:30 Room: 25.22.00.72 Jakub Gismatullin (Wrocław and HIM, Bonn) Metric ultraproducts of groups Tuesday 27.11.18 Guest lecture Time: 14:30 Room change: 5H Georges Comte (Chambéry) An explicit class of functions stable under Fourier transform and integration. Monday 17.12.18 Guest lecture Time: 14:30 Room: 25.22.03.73 Aleksandra Kwiatkowska (Münster) Kechris-Pestov-Todorcevic correspondence and its application to homeomorphism groups of dense trees. Abstract Tuesday 8.1.19 Guest lecture Time: 14:30 Room: 25.22.00.72 Oliver Lorscheid (IMPA, Rio de Janeiro) Descartes' rule of signs, Newton polygons, and polynomials over hyperfields Tuesday 15.1.19 Guest lecture Time: 14:30 Room: 25.22.00.72 Peter Arndt (Düsseldorf) A crash course on Topos theory Monday 11.2.19 Guest lecture Time: 16:30 Room: 25.22.03.73 Dmitry Sustretov (Higher School of Economics, Moscow) Geometry of Berkovich curves. Abstract Tuesday 12.2.19 Guest lecture Time: 14:30 Room: 25.22.00.72 Dmitry Sustretov (Higher School of Economics, Moscow) Gromov-Hausdorff limits of curves with flat metrics and non-Archimedean geometry Tuesday 19.2.19 Guest lecture Time: 14:30 Room: 25.22.00.72 Pablo Cubides Definable subsets of Berkovich curves Topic: A few talks on Theories with the NIP Tuesday 16.10.18 Room: 25.22.00.72 David Bradley-Williams Introduction to the NIP Friday 26.10.18 14:30 - 16:00 Room: 25.22.00.72 Florian Severin More about NIP Tuesday 6.11.18 Room: 25.22.00.72 Hamed Khalilian Type space and its topology Tuesday 20.11.18 Room: 25.22.00.72 Immanuel Halupczok Some more details about a proof Tuesday 11.12.18 Room: 25.22.00.72 David Definable groups in NIP / invariant measures Topic: Pseudofinite structures, potentially ACFA and geometry over difference fields Tuesday 15.1.19 Room: 25.22.00.72 Immi Overview of pseudofinite fields Tuesday 28.1.19 Room: 25.22.00.72 Hamed Khalilian Introduction to the model theory of difference fields

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