Wintersemester 2025/26

Wintersemester 2025/26

23.09.2025 um 10:00 Uhr in 69/E23

Tarek Emmrich (Universität Osnabrück)

Minors of algebraic matrices

Motivated by applications to the recovery of sparse signals on graphs, we study conditions under which minors of algebraic matrices are nonvanishing. For eigenvector matrices, we establish a sufficient criterion ensuring nonvanishing minors. For Vandermonde matrices, and in particular for Fourier matrices (a special case), we build on Chebotarev’s theorem. We further extend this framework in two directions: a real version and a finite field version. The latter, in particular, yields new results for Fourier matrices of squarefree order.

08.10.2025 um 14:00 Uhr in 69/125

Bentje Jantzen (Universität Osnabrück)

TBA

22.10.2025 um 09:00 Uhr in 69/E15

Christian Ahring (Universität Osnabrück)

TBA

29.10.2025 um 09:00 Uhr in 69/E15

Fynn Pörtner (Universität Osnabrück)

TBA

12.11.2025 um 09:00 Uhr in 69/E15

Mieke Fink (Universität Osnabrück)

TBA

19.11.2025 um 09:00 Uhr in 69/E15

Prof. Dr. Holger Brenner (Universität Osnabrück)

TBA

07.01.2026 um 09:00 Uhr in 69/E15

Torben Donzelmann (Universität Osnabrück)

TBA

22.01.2025 um 09:00 Uhr in 69/E15

Jhon Caicedo Portilla (Universität Osnabrück)

TBA