Geometry Seminar / Graduate Lectures
The Geometry seminar encompasses invited talks, Graduate Lectures of the Department of Mathematics as well as talks by Ph. D. students and theses defences.
Everyone interested is welcome to attend.
In the summer semester 2024 the seminar will take place in Z21/242.
| 16.07.2024 (Tue) Z21/242 15:00 |
TBA |
| 09.07.2024 (Tue) Z21/242 15:00 |
Pietro Giavedoni TBA |
| 02.07.2024 (Tue) Z21/242 15:00 |
TBA |
| 25.06.2024 (Tue) Z21/242 15:00 |
TBA |
| 18.06.2024 (Tue) Z21/242 15:00 |
Lorenzo Baldi (MPI-MIS Leipzig) TBA |
| 11.06.2024 (Tue) Z21/242 15:00 |
TBA |
| 04.06.2024 (Tue) Z21/242 15:00 |
TBA |
| 28.05.2024 (Tue) Z21/242 15:00 |
Vincenzo Galgano (MPI-CBG Dresden) Secant varieties to some generalised Grassmannians Abstract: Secant varieties are among the main protagonists in tensor decomposition, whose study involves both pure and applied mathematical areas. Any generalised Grassmannian G/P is a set of rank-1 "tensors" in the corresponding (minimal) irreducible representation, like Grassmannians for skew-symmetric tensors. The geometry of secant varieties to G/P is in general not completely understood. In this talk we discuss the 2nd secant variety to a generalised Grassmannian, and we give results on the identifiability and singularity in the case of Grassmannians. Some results are from a joint work with Reynaldo Staffolani. |
| 21.05.2024 (Tue) | no seminar (Pentecost holiday) |
| 14.05.2024 (Tue) Z21/242 15:00 |
TBA |
| 07.05.2024 (Tue) Z21/242 15:00 |
TBA |
| 30.04.2024 (Tue) Z21/242 15:00 |
kein Seminar |
| 23.04.2024 (Tue) Z21/242 15:00 |
Jakob Galley (TU Dresden) Topics around the Jacobian Conjecture |
| 16.04.2024 (Tue) Z21/242 15:00 |
kein Seminar |
|
09.04.2024 (Tue) |
Asgar Jamneshan (Koc University, Istanbul)
The inverse Gowers $U^3$-theorem and Conze-Lesigne factors The analogue of the Gowers uniformity norms for measure-preserving abelian actions is the Host-Kra-Gowers seminorms, which are intimately connected to the Host-Kra-Ziegler factors of such systems. The corresponding inverse question, in the dynamical setting, asks for a description of such factors in terms of systems of algebraic origin. In this talk, we present a satisfactory answer to inverse question in the case of the Gowers $U^3$-norm in the combinatorial setting by completely classifying Host-Kra-Ziegler factors of order $2$, also known as Conze-Lesigne factors, for all countable measure-preserving abelian actions. |
For current lectures one can also refer to the Events calendar - Faculty of Mathematics.
The list of talks from past semesters can be found in the archive.