Institut für Angewandte Mathematik
Seminar Operator Theory

This seminar is devoted to current research talks in the field of operator theory and its applications. It regularly takes place on Thursday, 12:15, in the seminar room AE02, Steyrergasse 30, ground floor, but time and place may change. The seminar is organized by Univ.-Prof. Dr. Jussi Behrndt, Dr. Petr Siegl, and Dr. Markus Holzmann.

2023
5.10.2023Delio Mugnolo (Fernuniversität Hagen)
Spectral Estimates for Laplace operators, Geometry of Graphs, and Expanders, abstract
12:15, SR AE02, Steyrergasse 30, ground floor
28.9.2023Nathanael Skrepek (TU Freiberg)
Boundary triples with quasi Gelfand triples, abstract
12:15, SR AE02, Steyrergasse 30, ground floor
2.8.2023Bernhard Aigner
Über geometrische Eigenschaften von Banachräumen
12:30, SR AE06, Steyrergasse 30, ground floor
22.6.2023Georg Stenzel (TU Graz)
Spectral analysis of Schrödinger operators with oblique transmission conditions in R^2
12:15, SR AE02, Steyrergasse 30, ground floor
15.6.2023Matej Tusek (CTU Prague)
Echoes of the Klein paradox in approximations of the relativistic point interactions, abstract
12:15, SR AE02, Steyrergasse 30, ground floor
15.6.2023Lukas Heriban (CTU Prague)
Non-local relativistic delta shell interactions, abstract
13:00, SR AE02, Steyrergasse 30, ground floor
25.5.2023Markus Holzmann (TU Graz)
Approximation of magnetic Schrödinger operators with electric delta-potentials supported on networks
12:15, SR AE02, Steyrergasse 30, ground floor
11.5.2023Petr Siegl (TU Graz)
Generalized Airy Operators, abstract
12:15, SR AE02, Steyrergasse 30, ground floor
4.5.2023Fritz Gesztesy (Baylor University, Waco, TX, USA)
Some recent developments in Hardy-type inequalities, abstract
12:15, SR AE02, Steyrergasse 30, ground floor
27.4.2023Henk de Snoo (University of Groningen, Netherlands)
Boundary triplets and Weyl functions for the Bessel operator
12:15, SR AE02, Steyrergasse 30, ground floor
23.3.2023Marco Vogel (Universität Oldenburg)
Spectral properties of Robin-Laplacians on sharp infinite cones, abstract
12:15, SR AE02, Steyrergasse 30, ground floor
16.3.2023Nicolas Weber (TU Graz)
Spectral asymptotics of Landau Hamiltonians under delta perturbations (with Toeplitz operators) in R^2
12:15, SR AE02, Steyrergasse 30, ground floor
9.3.2023Iveta Semoradova (TU Graz)
Asymptotic behaviour of eigenfunctions of Schrödinger operators
12:15, SR AE02, Steyrergasse 30, ground floor
26.1.2023Romana Kvasničková (CTU Prague / TU Graz)
Weakly coupled eigenvalues
12:15, SR AE02, Steyrergasse 30, ground floor
19.1.2023Dale Frymark (TU Graz)
Non-relativistic limits of Dirac Operators in Confinement
12:15, SR AE02, Steyrergasse 30, ground floor
12.1.2023Georg Stenzel (TU Graz)
Schrödinger operators with generalized oblique transmission conditions
12:15, SR AE02, Steyrergasse 30, ground floor
2022
15.12.2022Zhu Li
On essential numerical ranges and essential spectra of linear Hamiltonian systems with one singular endpoint
12:15, SR AE02, Steyrergasse 30, ground floor
1.12.2022Christian Stelzer
Approximation of Dirac operators with delta-potentials
12:15, SR AE02, Steyrergasse 30, ground floor
17.11.2022Borbala Gerhat (CTU Prague)
An improved discrete Rellich inequality on the half-line, abstract
12:15, SR AE02, Steyrergasse 30, ground floor
3.11.2022Sabine Bögli (Durham University, GB)
Constructing Schrödinger operators with prescribed eigenvalues, abstract
12:15, SR AE02, Steyrergasse 30, ground floor
3.11.2022Fritz Gesztesy (Baylor Universit, USA)
Sturm–Liouville M-Functions in Terms of Green’s Functions
13:00, SR AE02, Steyrergasse 30, ground floor
20.10.2022Georg Stenzel (TU Graz)
Schrödinger operators with oblique transmission conditions in R^2
12:15, SR AE02, Steyrergasse 30, ground floor
13.10.2022Romana Kvasničková (CTU Prague / TU Graz)
Absence of embedded boundstates in semi-Dirac semi-metals, abstract
12:15, SR AE02, Steyrergasse 30, ground floor
6.10.2022Seppo Hassi (University of Vaasa, Finland)
Representation theorems for general semibounded forms
12:15, SR AE02, Steyrergasse 30, ground floor
6.10.2022Henk de Snoo (University of Groningen, Netherlands)
Friedrichs and Krein type extensions
13:00, SR AE02, Steyrergasse 30, ground floor