conferences & talks
2023
- organizing: BIRS Workshop "Differential-algebraic equations and Operator Pencils" (co-organizers: M. Embree, K. Morris, T. Reis), Banff (CAN), Apr
- Elgersburg/Ilmenau Workshop 2023, Ilmenau, Mar, invited plenary talk
2022
- Colloquium Talk at University of Paderborn, Dec
- MTNS 2022, Bayreuth, Sep, organizing session on infinite-dimensional ISS
- IWOTA 2022, Cracow, Sep: organizing session Functional calculus and spectral constants
- GAMM Annual meeting 2022, Aachen, Aug
- WOSTAP: together with Marcus Waurick (TU Freiberg), we are organizing a Workshop on Systems Theory
and
PDEs (WOSTAP), July 18-22. Registration is open
- research stay at Lund University, March
- research stay at University of Bordeaux, March
2021
- research stay and seminar talk at Lund University, Nov
- talk in Online Seminar on ISS, Nov
- SCINDIS 2021invited speaker, Sep
- IWOTA 2021, Lancaster, Aug
- 13th International ISAAC Congress, Gent, Aug
- organizing Mini-Workshop: Mathematics of Dissipation – Dynamics, Data and Control
(together with S. Grundel, J. Scherpen, V. Mehrmann),
Mathematisches Forschungsinstitut Oberwolfach, May 9-15
- Oberseminar Analysis TU Dresden, May 6
- One-Parameter Semigroups of Operators (OPSO 2021), April 5-9
- Small Collaboration: Numerical Analysis of Electromagnetic: Twente/Duisburg-Essen
Mathematisches Forschungsinstitut Oberwolfach, March 21-26
- Oberseminar Passau (online), Jan 11
2020
organizing: Minisymposium The many faces of mathematical systems theory
with Thomas Berger, Paderborn, DMV Annual meeting, TU Chemnitz (virtual meeting), Sep 14-18
- Annual meeting of NDNS+ cluster (Nonlinear Dynamical Systems of Natural Systems),
virtual talk, June
- Lothar-Collatz Seminar, University of Hamburg, virtual talk, May
- Talk in Online Seminar in Linear Algebra and Operator Theory (Oselot), May 7
- SACS Seminar, University of Twente, March
- Elgersburg Workshop 2020, Elgersburg (GER), Feb 24-28
2019
- Conference Operator Theory and Krein spaces
Vienna (AUT), Dec
- organized: 8th Weihnachtskolloquium, Vienna University of Technology, Dec 20
- Conference Interpolation in Spaces of Analytic Functions
invited talk, CIRM Luminy (FRA), Nov
- organized: Workshop on the occassion of Hans Zwart's 60th birthday,
with B. Jacob, University of Twente, Oct 25-26
- lecturer at summerschool Unitary Dilations and Interpolation Problems,
Gruenau (AUT), Sep 28-30
- IWOTA 2019,
Lisbon (POR), July 22-26
organized Session `Functional calculus, spectral sets and constants' (with Wojtylak, Kosinski)
- Applied Math Seminar at University of Waterloo, Waterloo (CAN), July 3 3
- 'Focused research group on extremal Blaschke products' at BIRS, Banff (CAN), June 23-30
- seminar talk, University of Passau, Passau (GER), June 13
- organized Kick-Off: International HUB Norddeutschland des TU Wien Alumni Clubs,
Hamburg, April 26
- organized Mini-Workshop on Operator Theory, University of Hamburg, April 25
- Elgersburg Workshop 2019, Elgersburg (GER), Feb 24-28
- GAMM 2019, Vienna (AUT), Feb 18-22
organized Minisymposium Input-to-state stability of distributed parameter systems
- organized
Bremen-Hamburg^2-Kiel-Seminar, TU Hamburg-Harburg (GER), Jan 21
- seminar talk in functional analysis seminar, TU Wien, Vienna, Jan 7
2018
- Organized: 7th Weihnachtskolloquium, Vienna University of Technology, Dec 21
- Invited seminar talk, host: Michael Hartz, Fernuni Hagen (GER), Nov 29
- Workshop on Stability and Control of Infinite-Dimensional Systems SCINDIS-2018,
Wuerzburg (GER), Oct
- Summer School on Control of Evolution Equations,
Wuppertal (GER), Oct
- plenary talk at Workshop of the 21st Internetseminar "Functional Calculus",
Wuppertal (GER), Jul
- Workshop on Operator Theory, Complex Analysis, and Applications (WOTCA) 2018, invited talk, Guimaraes (POR), Jun
- Reserach stay and
invited seminar talk, host: Lars Gruene, Bayreuth (GER), Jun
- Invited seminar talk, host: Robert Altmann, Augsburg (GER), Jun
- Research stay and invited seminar talk, Jagiellonian University
(one week, guest of M. Wojtylak and L. Kosinski), Krakow (POL), May
- 6th Miniworkshop
Operator Theoretic Aspects of Ergodic Theory, Wuppertal (GER), May
- GAMM 2018, organized Section Applied Operator Theory, Munich (GER), Mar
- GDMV 2018, invited talk in session: Functional Analysis, Paderborn (GER), Mar
- Elgersburg Workshop 2018, invited talk, Elgersburg (GER), Feb
- Invited seminar talk, TU Dresden, Oberseminar Analysis, Dresden (GER), Jan 25
- Workshop on „Control theory of infinite-dimensional systems", Hagen (GER), Jan
2017
- Organized: 6th Weihnachtskolloquium, Vienna University of Technology, Dec 22.
- Research stay (one week, guest of O. Nevanlinna), Espoo (FIN), Dec
- Research stay (one week, guest of J.R. Partington), Leeds (UK), Sep
- IWOTA 2017, Chemnitz (GER), Aug
- Workshop on "Crouzeix's conjecture ", AIM-San Jose (CA, USA) , Aug
- Control of Distributed Parameter Systems (CDPS), Bordeaux (FRA), July
- Mathematical aspects of the physics with non-self-adjoint operators, CIRM-Luminy (FRA), June
- Operator Semigroups: Modern Developments, Bedlewo (POL), April
- GAMM 2017, Weimar (GER), March
- Elgersburg Workshop 2017, Elgersburg (GER), Feb
2016
- Operator Theory
and
Indefinite Inner Product Spaces, Vienna (AUT), Dec,
organized special session for young researchers "Weihnachtskolloquium 2016"
- Invited talk at INFDIM 16 -- Workshop on stability and control of infinite-dimensional systems. Passau, Oct.
- 4th Heidelberg Laureates Forum (4th HLF), Heidelberg, Sep.
- IWOTA 16, St. Louis (US), July 18-22 ,
Invited talk in special session "State space methods in operator and function theory" (organized by J. Ball, S. ter Horst)
- Invited seminar talk, CAU Kiel, Oberseminar Analysis, Kiel, June 23.
- 2nd Workshop on Operator Theoretic Aspects of Ergodic Theory, CAU Kiel, June 13-14.
- Invited seminar talk, TU Wien, Functional analysis seminar, Vienna, May 22.
- Invited talk, Hagen-Wuppertaler Analysis-Tag, Wuppertal, May 5.
- Spectral Theory and Applications: Conference in memory of Boris Pavlov, Stockholm, March.
- GAMM/DMV Jahrestagung 2016, Braunschweig, March.
- Elgersburg School 2016, Elgersburg, March.
- Invited seminar Talk, KIT Karlsruhe (GER), Feb 3.
- 1st Workshop on Operator Theoretic Aspects of Ergodic Theory , Wuppertal, Jan 29-30.
2015
- Organized: 4th Weihnachtskolloquium, Vienna University of Technology, December 22.
- Invited Seminar Talk, KU Eichstaett (GER), December 16.
- Mini-Workshop: Recent Developments on Approximation Methods for Controlled Evolution Equations,
MFO Oberwolfach (GER), November.
- Young Researchers Workshop on Spectral Theory, Bern (CH), October.
- Organized: Workshop on the occasion of PhD defense F. Schwenninger,
Enschede (NL), September.
- Summer School - Semigroups for Dynamical Systems: Perturbation, Positivity, Networks, Wuppertal (GER), July.
- Workshop of the GAMM Activity Group Applied Operator Theory, Budapest (HUN), May.
- Invited Seminar Talk at TUHH, TU Hamburg-Harburg, May.
- GAMM 2015, Lecce (ITA), March.
- 7th Elgersburg School, Elgersburg (GER), March.
- Organized: Neujahrskolloquium, Vienna (AUT), January.
2014
- VOTCAM 2014, Lexington Va (US), November.
- IWOTA 2014, Amsterdam (NL), July.
- MTNS 2014, Groningen (NL), July.
- Workshop on Port-Hamiltonian Systems, Leiden (NL), March.
- GAMM 2014, Erlangen (GER), March.
2013
2012
Schools