22 June - 26 June 2020

# Past events

Events at the Centre for Symmetry and Deformation.

**Search for certain years in the panel below.**

15 June 2020,
15:15-16:15

### Algebra/Topology Seminar

Speaker: Jovana Obradovic (Serbian Academy of Sciences and Arts)

Title: Combinatorial homotopy theory for operads

8 June 2020,
15:15-16:15

### Algebra/Topology Seminar

Speaker: Christian Dahlhausen (University of Zurich)

Title: Continuous K-theory and cohomology of rigid spaces

1 June 2020,
15:15-16:15

### Algebra/Topology Seminar

Charanya Ravi (University of Regensburg)

29 May 2020,
16:15-17:00

### What is... a Coxeter group?

Benjamin Brück will explain what a Coxeter group is.

25 May - 29 May 2020

### Scissors congruence, then and now (Postponed to 2021)

Masterclass.

**Postponed to early January. It will be confirmed in due course**. 18 May 2020,
15:15-16:15

### Algebra/Topology Seminar

Speaker: Markus Hausmann (Universität Bonn)

4 May 2020,
15:15-16:15

### Algebra/Topology Seminar

Speaker: Zhen Huan (Huazhong University of Science and Technology)

Title: Quasi-elliptic cohomology and related problems

24 Apr. 2020,
16:15-17:00

### What is... mean curvature flow?

Felix Lubbe will explain what mean curvature flow in higher codimension is.

20 Apr. 2020,
15:15-16:15

### Algebra/Topology seminar

Speaker: Irakli Patchkoria (University of Aberdeen)

Title: Equivariant Stallings-Swan theorem and cohomology of orbit categories

8 Apr. 2020,
16:15-17:00

### What is... non-commutative geometry?

Philipp Schmitt will explain what non-commutative geometry is.

27 Mar. 2020,
16:15-17:00

### What is... a topological quantum field theory (TQFT)?

Thomas Wasserman will explain what a topological quantum field theory (TQFT) is.

23 Mar. 2020,
15:15-16:15

### Algebra/Topology Seminar - CANCELLED

Speaker: Bruce Bartlett (Stellenbosch University)

16 Mar. 2020,
15:15-16:15

### Algebra/Topology Seminar - CANCELLED

Speaker: Julian Holstein (University of Hamburg)

Title: Homotopy theory of monoids and localization

13 Mar. 2020,
13:15-14:15

### Number Theory Seminar

Tuan Ngo Dac will talk about Special values and tensor powers of Drinfeld modules.

9 Mar. 2020,
15:15-16:15

### Algebra/Topology Seminar

Speaker: Zhiyuan Ding

Title: On analogues of modular units for the moduli stack of Drinfeld shtukas

6 Mar. 2020,
14:15-15:15

### Number Theory Seminar

Martin Widmer will talk about the "Rate of escape for lattices and their duals".

2 Mar. 2020,
15:15-16:15

### Algebra/Topology Seminar

Speaker: Omar Antolin-Camarena

Title: Thom ring spectra and orientation

28 Feb. 2020,
16:15-17:00

### What is... a knot?

Nanna Aamand will explain what a knot is.

24 Feb. 2020,
15:15-16:15

### Algebra/Topology Seminar

Speaker: Markus Linckelmann (City, University of London)

Title: On degree -1 operators in cohomology

21 Feb. 2020,
13:15-14:15

### Number Theory Seminar

Sazzad Biswas (KU) will talk about ``Computation of the Langlands's lambda function for a finite Galois extension.''

17 Feb. 2020,
15:15-16:15

### Algebra/Topology seminar

Speaker: Jeremy Hahn (MIT)

Title: Using the Adams spectral sequence to make smooth structures on manifolds

14 Feb. 2020,
16:15-17:30

### Seminar by Mads Kyed (Flensburg)

**Title:**Navier-Stokes equations: Steady flow around a two-dimensional rotating body.

13 Feb. 2020,
15:15-16:15

### Algebra/Topology seminar

Speaker: Zhaoting Wei (Kent State University-Geauga)

Title: Maurer-Cartan equation and perfect complexes

10 Feb. 2020,
11:15-12:30

### Seminar by Dorothea Bahns (U Göttingen)

**Title:**The Gabor wavefront set and the twisted convolution