Institut für Angewandte Mathematik |
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Seminar Operator Theory |
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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. | ||
2024 |
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2.5.2024 | Bao Quoc Tang (Karl Franzens Universität) | |
TBA | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
25.4.2024 | Christian Emmel (Stockholm University, Sweden) | |
TBA | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
18.4.2024 | Jean-Claude Cuenin (Loughborough University/TU Graz) | |
Spectral cluster bounds for orthonormal functions, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
11.4.2024 | Georg Stenzel | |
Spectral analysis of generalised Robin and Neumann Laplacians in R^2 | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
21.3.2024 | Nicolas Weber | |
Weakly coupled bound states for one-dimensional Schrödinger operators with complex potentials | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
14.3.2024 | Sahiba Arora (University of Twente, Netherlands) | |
An anti-maximum principle for the Dirichlet-to-Neumann operator, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
7.3.2024 | Selim Sukhtaiev (Auburn University, USA) | |
The Maslov index in spectral theory: an overview, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
7.3.2024 | Julien Royer (Universite Toulouse, France) | |
Local energy decay and low frequency asymptotics for the Schrödinger equation, abstract | ||
13:00, SR AE02, Steyrergasse 30, ground floor | ||
25.1.2024 | Delio Mugnolo (Fernuniversität Hagen) | |
Pointwise eigenvector estimates by landscape functions, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
18.1.2024 | Nicolas Weber | |
Bound states of weakly coupled Schrödinger operators with complex-valued regular potentials in two dimensions | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
2023 |
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21.12.2023 | Petr Siegl | |
Energy decay for the wave equation with a damping coefficient unbounded at infinity | ||
10:00, SR AE02, Steyrergasse 30, ground floor | ||
21.12.2023 | Johannes Ladreiter | |
Schrödinger operators with oblique transmission conditions and complex interaction strenghts in R^2 | ||
10:45, SR AE02, Steyrergasse 30, ground floor | ||
21.12.2023 | Nicolas Weber | |
Eigenvalues of the Schrödinger operator in 2D with a constant complex-valued singular potential supported on the unit circle | ||
13:30, SR AE02, Steyrergasse 30, ground floor | ||
21.12.2023 | Peter Schlosser | |
Quaternionic Hilbert spaces and the S-spectrum | ||
14:15, SR AE02, Steyrergasse 30, ground floor | ||
14.12.2023 | Sabine Bögli (Durham University, UK) | |
Numerical ranges and multiplier tricks, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
7.12.2023 | Jussi Behrndt | |
Spectral instability of the Krein-von Neumann extension, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
22.11.2023 | Carsten Trunk (TU Ilmenau) | |
Essential spectra of Sturm-Liouville operators, abstract | ||
16:00, SR AE06, Steyrergasse 30, ground floor | ||
16.11.2023 | Antonio Arnal (TU Graz) | |
Resolvent estimates for one-dimensional Dirac operators with complex potentials, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
9.11.2023 | Vladimir Lotoreichik (Czech Academy of Sciences, Prague) | |
Spectral asymptotics of the Dirac operator on a thin shell, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
19.10.2023 | Nicolas Weber (TU Graz) | |
Schrödinger operators with complex delta-interactions on the (n-1)-dimensional hyperplane | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
12.10.2023 | Markus Holzmann (TU Graz) | |
Nonrelativistic limit of generalized MIT bag models | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
5.10.2023 | Delio Mugnolo (Fernuniversität Hagen) | |
Spectral Estimates for Laplace operators, Geometry of Graphs, and Expanders, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
28.9.2023 | Nathanael Skrepek (TU Freiberg) | |
Boundary triples with quasi Gelfand triples, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
2.8.2023 | Bernhard Aigner | |
Über geometrische Eigenschaften von Banachräumen | ||
12:30, SR AE06, Steyrergasse 30, ground floor | ||
22.6.2023 | Georg Stenzel (TU Graz) | |
Spectral analysis of Schrödinger operators with oblique transmission conditions in R^2 | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
15.6.2023 | Matej Tusek (CTU Prague) | |
Echoes of the Klein paradox in approximations of the relativistic point interactions, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
15.6.2023 | Lukas Heriban (CTU Prague) | |
Non-local relativistic delta shell interactions, abstract | ||
13:00, SR AE02, Steyrergasse 30, ground floor | ||
25.5.2023 | Markus Holzmann (TU Graz) | |
Approximation of magnetic Schrödinger operators with electric delta-potentials supported on networks | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
11.5.2023 | Petr Siegl (TU Graz) | |
Generalized Airy Operators, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
4.5.2023 | Fritz Gesztesy (Baylor University, Waco, TX, USA) | |
Some recent developments in Hardy-type inequalities, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
27.4.2023 | Henk de Snoo (University of Groningen, Netherlands) | |
Boundary triplets and Weyl functions for the Bessel operator | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
23.3.2023 | Marco Vogel (Universität Oldenburg) | |
Spectral properties of Robin-Laplacians on sharp infinite cones, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
16.3.2023 | Nicolas 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 | ||
9.3.2023 | Iveta Semoradova (TU Graz) | |
Asymptotic behaviour of eigenfunctions of Schrödinger operators | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
26.1.2023 | Romana Kvasničková (CTU Prague / TU Graz) | |
Weakly coupled eigenvalues | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
19.1.2023 | Dale Frymark (TU Graz) | |
Non-relativistic limits of Dirac Operators in Confinement | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
12.1.2023 | Georg Stenzel (TU Graz) | |
Schrödinger operators with generalized oblique transmission conditions | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
2022 |
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15.12.2022 | Zhu Li | |
On essential numerical ranges and essential spectra of linear Hamiltonian systems with one singular endpoint | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
1.12.2022 | Christian Stelzer | |
Approximation of Dirac operators with delta-potentials | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
17.11.2022 | Borbala Gerhat (CTU Prague) | |
An improved discrete Rellich inequality on the half-line, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
3.11.2022 | Sabine Bögli (Durham University, GB) | |
Constructing Schrödinger operators with prescribed eigenvalues, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
3.11.2022 | Fritz Gesztesy (Baylor Universit, USA) | |
Sturm–Liouville M-Functions in Terms of Green’s Functions | ||
13:00, SR AE02, Steyrergasse 30, ground floor | ||
20.10.2022 | Georg Stenzel (TU Graz) | |
Schrödinger operators with oblique transmission conditions in R^2 | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
13.10.2022 | Romana Kvasničková (CTU Prague / TU Graz) | |
Absence of embedded boundstates in semi-Dirac semi-metals, abstract | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
6.10.2022 | Seppo Hassi (University of Vaasa, Finland) | |
Representation theorems for general semibounded forms | ||
12:15, SR AE02, Steyrergasse 30, ground floor | ||
6.10.2022 | Henk de Snoo (University of Groningen, Netherlands) | |
Friedrichs and Krein type extensions | ||
13:00, SR AE02, Steyrergasse 30, ground floor |