The Bonn-Münster-Düsseldorf GeSAMT (Gemeinsames Seminar Algebra und Modelltheorie)
takes place on a few times per year, each consisting of about 3 talks on various subjects around algebra and model theory.

The location usually alternates between Bonn, Düsseldorf and Münster.

For any questions and to receive announcements about the seminar, please contact either Florian Felix (Düsseldorf), Silke Meißner (Münster), Zahra Mohammadi (Münster), Blaise Boissonneau (Düsseldorf), or Immanuel Halupzcok (Düsseldorf).

Bonn, Düsseldorf and Münster are also part of the wider region participating in the Regional days in Model Theory and Applications.### WiSe 24/25

The location usually alternates between Bonn, Düsseldorf and Münster.

For any questions and to receive announcements about the seminar, please contact either Florian Felix (Düsseldorf), Silke Meißner (Münster), Zahra Mohammadi (Münster), Blaise Boissonneau (Düsseldorf), or Immanuel Halupzcok (Düsseldorf).

Bonn, Düsseldorf and Münster are also part of the wider region participating in the Regional days in Model Theory and Applications.

Saturday, 26.10.2024, in **Münster**, Orléans-Ring 12, SRZ216/217.
**12:15 - 14:00** Lunch

**14:00 - 15:00** Silke Meißner (Münster): *2-ample theories and pseudo-buildings*

**15:15 - 16:15** Yilong Zhang (Bonn): *Hrushovski construction in ordered fields*

**16:15 - 16:45** Coffee break

**16:45 - 17:45** Blaise Boissonneau (Düsseldorf): *Enlarge your spine*

### WiSe 22/23

11:45-12:45 Daniel Hoffmann(Münster/Warsaw/Dresden), A bit of model theory of finite group actions

13:00 Lunch

14:45-15:45 Alessandro Codenotti (Münster), Some examples of tame dynamical systems answering questions of Glasner and Megrelishvili

16:00-17:00 Francesco Gallinaro (Freiburg), Quasiminimality of Complex Powers

### SoSe 22

10:30-11:00 Coffee

11:00-12:15 Silvain Rideau-Kikuchi (Paris),* Enriching stably embedded sets and expansions of the integers *;

12:15-14:30 Lunch at Milano + Coffee

14:30-15:45 Simon André (Münster),* On the Tarski problem for hyperbolic groups *;

15:45-16:00 Coffee

16:00-17:15 Jan Moritz Petschick,*Nilpotent Groups with the Magnus property *;

### WiSe 21/22

** Friday **

10:30 - 11:10 Beginning and tea in**Lecture Hall 5F**

Talks**Lecture Hall 5F**:

11:10 - 12:25: Pablo Cubides Kovacsics (Düsseldorf),*Beautiful pairs and pro-definability*;

Abstract

Lunch

Talks in** 25.22.U1-34 **:

14:35 - 15:50: Anna-Maria Ammer (Münster),*First-order theory of free generalized n-gons*;

Abstract

Longer coffee break;

16:30 - 17:45: Philip Dittmann (Dresden),*Existential rank and essential dimension of definable sets*;

Abstract

** Saturday **

Talks**Lecture Hall 5G**:

09:25 - 10:40: Tingxiang Zou (Münster),*Generalized measurable H-structures*;

Abstract

Coffee break

11:10 - 12:25: Nadja Valentin (Düsseldorf),*Non-degenerate n-linear forms and n-dependence*;

Abstract

Lunch break;

14:35 - 15:50: Jan Dobrowolski (Münster),*Neostability in positive logic*;

Abstract

Final coffee

### WiSe 19/20: GeSAMT V

**Saturday**, 30. November 2019, in **Düsseldorf**, Universitätsstr. 1, Gebaude 25.22.
**Talks in building 25.22, on this map, close to metro "Uni Ost/Botanischer Garten".**

10:30 - 10:55: Welcome / Coffee / Tea in**25.22.03.69.**

Talks in room**25.22.02.81**:

11:00 - 12:15: Amador Martin-Pizarro (Freiburg),*Open core in dense pairs of geometric topological structures*;

Abstract

Lunch

14:15 - 15:30: Franziska Jahnke (Münster),*Characterising NIP henselian fields*;

Abstract

Coffee / Tea break;

16:00 - 17:15: Tim Clausen (Münster),*Geometries in sharply 2-transitive groups of finite Morley rank*.

### WiSe 18/19

**10:30 - 11:00** Welcome coffee break

**11:00 - 12:00** Akash Hossain (Paris): *Forking in valued fields and related structures*

Saturday, 28th of January in **Bonn**, Endenicher Allee 60 in the Lipschitz-Saal at the Mathematical Institute.

All talks are one hour with an additional 15 minutes for questions:

All talks are one hour with an additional 15 minutes for questions:

11:45-12:45 Daniel Hoffmann(Münster/Warsaw/Dresden), A bit of model theory of finite group actions

13:00 Lunch

14:45-15:45 Alessandro Codenotti (Münster), Some examples of tame dynamical systems answering questions of Glasner and Megrelishvili

16:00-17:00 Francesco Gallinaro (Freiburg), Quasiminimality of Complex Powers

Saturday, 11th of June in **Münster**, Einsteinstraße 64, Lecture Hall M4

All talks are one hour with an additional 15 minutes for questions:

10:30-11:00 Coffee

11:00-12:15 Silvain Rideau-Kikuchi (Paris),

12:15-14:30 Lunch at Milano + Coffee

14:30-15:45 Simon André (Münster),

15:45-16:00 Coffee

16:00-17:15 Jan Moritz Petschick,

Friday, 12.11. and Saturday, 13.11 2021, in **Düsseldorf**, Universitätsstr. 1, Gebaude 25.22.

10:30 - 11:10 Beginning and tea in

Talks

11:10 - 12:25: Pablo Cubides Kovacsics (Düsseldorf),

Abstract

Lunch

Talks in

14:35 - 15:50: Anna-Maria Ammer (Münster),

Abstract

Longer coffee break;

16:30 - 17:45: Philip Dittmann (Dresden),

Abstract

Talks

09:25 - 10:40: Tingxiang Zou (Münster),

Abstract

Coffee break

11:10 - 12:25: Nadja Valentin (Düsseldorf),

Abstract

Lunch break;

14:35 - 15:50: Jan Dobrowolski (Münster),

Abstract

Final coffee

10:30 - 10:55: Welcome / Coffee / Tea in

Talks in room

11:00 - 12:15: Amador Martin-Pizarro (Freiburg),

Abstract

Lunch

14:15 - 15:30: Franziska Jahnke (Münster),

Abstract

Coffee / Tea break;

16:00 - 17:15: Tim Clausen (Münster),

Friday, 30. November 2018, in **Münster, Einsteinstr. 62**.

Talks in **Room N2**.

Coffee / Tea in the**Lichthof**.

10:30 - 11:00: Welcome / Coffee / Tea in the Lichthof;

11:00 - 12:00: Pierre Touchard (Münster),* Burden in mixed characteristic Henselian
valued fields*;

Lunch

13:30 - 14:30: Matteo Vannacci (Düsseldorf),* Pro-p groups with quadratic $\mathbb{F}_p$-cohomology and generalised p-RAAGs*;

14:30 - 15:14: Coffee / Tea break;

15:15 - 16:15: Peter Arndt (Düsseldorf),* Ranges of functors and elementary classes via topos theory*.

The**Lichthof** is on the 8th floor of the 8-storey block. From the stairs or lift, find it half-way along the corridor.

If you are searching for**N2**, that is at ground level in an appropriate choice of building next to the 8-storey block.

A local bus stop is**P+R Coesfelder Kreuz**.

Some relevant maps can be found here.

### SoSe 17

**Talks in building 25.22, on this map, close to metro "Uni Ost/Botanischer Garten".**

**Room 25.22.03.72**

12.10-13.10: Florian Severin (Düsseldorf),* Variants of Hensel's lemma*;

Lunch

14.05-15.05: Tim Clausen (Münster),*Dp-minimal profinite groups*;

15.15-16.15: Martin Bays (Münster),*Definability in the group of infinitesimal rotations*.

### WiSe 16/17

**Talks in building 25.22, on this map, close to metro "Uni Ost/Botanischer Garten".**

**Room 25.22.00.72**

11.30-12.30: Immanuel Halupczok (Düsseldorf),*A new analogue of o-minimality for valued fields*;

**Room 25.22.02.81**

14.00-15.00: Aleksandra Kwiatkowska (Münster),*Cyclically dense conjugacy classes in topological groups*;

15.05-16.05: Mohammad Bardestani (Münster),*Orbit methods and faithful representation of groups*.

16:45 - 17:45: Particpants may also be interested in the colloquium, held today in room**25.22 HS 5H**.

**Talks in room M6**

11.00-12.00: Katrin Tent (Münster),*Building like geometries
of finite Morley rank*;

13.30-14.30: Gönenç Onay (Münster),*On the theory of modules of F_p((T))*;

14.45-15.45: David Bradley-Williams (Düsseldorf),*Definable relations and syzygetic subsets of trees*.

Coffee / Tea in the

10:30 - 11:00: Welcome / Coffee / Tea in the Lichthof;

11:00 - 12:00: Pierre Touchard (Münster),

Lunch

13:30 - 14:30: Matteo Vannacci (Düsseldorf),

14:30 - 15:14: Coffee / Tea break;

15:15 - 16:15: Peter Arndt (Düsseldorf),

The

If you are searching for

A local bus stop is

Some relevant maps can be found here.

Friday, 14. July 2017, in **Düsseldorf**.

12.10-13.10: Florian Severin (Düsseldorf),

Lunch

14.05-15.05: Tim Clausen (Münster),

15.15-16.15: Martin Bays (Münster),

Friday, 3. February 2017, in **Düsseldorf**.

11.30-12.30: Immanuel Halupczok (Düsseldorf),

14.00-15.00: Aleksandra Kwiatkowska (Münster),

15.05-16.05: Mohammad Bardestani (Münster),

16:45 - 17:45: Particpants may also be interested in the colloquium, held today in room

Friday, 4. November 2016, in **Münster**.

11.00-12.00: Katrin Tent (Münster),

13.30-14.30: Gönenç Onay (Münster),

14.45-15.45: David Bradley-Williams (Düsseldorf),