Iterative regularization of non-smooth ill-posed problems, Inverse Problems Seminar, The Chinese University of Hong Kong, November 17, 2022.
Convex relaxation of hybrid discrete-continuous control problems, Seminar on Computational Engineering, LUT University, Lappeenranta, Finland, September 28, 2021.
Optimal control of nonsmooth partial differential equations, Research Seminar in Optimization, Humboldt-Universität zu Berlin, April 20, 2021.
Optimal control of nonsmooth partial differential equations, IFIP WG 7.2 Virtual Seminar, February 2, 2021.
Nonsmooth regularization of a coefficient inverse problem for the wave equation, Mathematical Colloquium, Universidade Federal de Santa Catarina, Florianópolis, Brasil, October 30, 2020 (online).
Convex relaxation of hybrid discrete-continuous control problems, Mathematisches Kolloquium, Heinrich-Heine-Universität Düsseldorf, December 13, 2019.
Multibang regularization of a coefficient inverse problem for the wave equation, Forschungsseminar Inverse Probleme und PDEs, TU Chemnitz, September 3, 2019.
Accelerated primal--dual methods for structured non-convex optimization, Computational and Applied Mathematics Seminar, Chalmers University of Technology, Göteborg, Sweden, August 28, 2019.
Generalized modes in Bayesian inverse problems, Forschungsseminar Mathematische Statistik, Humbold-Universität Berlin, February 9, 2019.
Nichtglatte Optimierung im Funktionenraum, Kolloquium Mathematik, Universität Paderborn, July 9, 2018.
Convex relaxation of hybrid discrete-continuous control problems, Universität Paderborn, March 13, 2018.
Convex regularization of discrete-valued inverse problems, Universiteit Twente, Enschede, Netherlands, September 27, 2017.
Convex relaxation of hybrid discrete-continuous control problems, Universität Bayreuth, June 16, 2017.
Convex relaxation of hybrid discrete-continuous control problems, Weierstraß-Institut für Angewandte Analysis und Stochastik, Berlin, March 29, 2017.
Stochastic inverse problems with impulsive noise, Karl-Franzens-Universität Graz, March 15, 2017.
Discrete regularization of parameter identification problems, Alpen-Adria-Universität Klagenfurt, November 16, 2016.
A primal-dual extragradient method for nonlinear inverse problems for PDEs, Karl-Franzens-Universität Graz, September 28, 2016.
Discrete regularization of parameter identification problems, University of Helsinki, August 25, 2016.
Discrete regularization of parameter identification problems, University of Tokyo, August 12, 2016.
Convex relaxation of hybrid discrete-continuous regularization, Fudan University, Shanghai, August 2, 2015.
Convex relaxation of hybrid discrete-continuous problems, Sandia National Laboratories, Albuquerque, March 23, 2015.
Sparse optimization of PDEs with application to light source placement, Kolloquium der FR Mathematik, Universität des Saarlandes, Saarbrücken, February 6, 2015.
Sparse optimization of PDEs with application to light source placement, Colloquium Nonlinear Science, Westfälische Wilhelms-Universität Münster, January 27, 2015.
Convex relaxation of hybrid binary-continuous penalties, Westfälische Wilhelms-Universität Münster, November 19, 2014.
Sparse optimization of PDEs with application to light source placement, University College London, October 10, 2014.
Wieviel Mathematik steckt im "Kernspin"?, WissensNacht Ruhr, Essen, October 2, 2014.
Nichtglatte Optimierung im Funktionenraum, Duisburger Arbeitskreis für Mathematik in Forschung und Praxis, May 27, 2014.
A convex analysis approach to hybrid binary-continuous optimal control problems, University of California, Riverside, May 23, 2014.
A convex analysis approach to hybrid binary-continuous optimal control problems, Cambridge University, April 28, 2014.
A convex analysis approach to hybrid binary-continuous optimal control problems with application to multi-bang controls, Institut für Mathematik, Alpen-Adria-Universität Klagenfurt, January 14, 2014.
Multi-bang control of elliptic equations, Zentrum Mathematik, Technische Universität München, December 17, 2013.
Parameter identification problems with non-Gaussian noise, Lothar Collatz Colloquium, Universität Hamburg, May 16, 2013.
Numerische Optimierung im Maßraum, Universität Bayreuth, April 17, 2013.
Numerische Optimierung im Maßraum, Humboldt-Universität zu Berlin, February 11, 2013.
Parameter identification problems with non-Gaussian noise, University of Tokyo, January 24, 2013.
Parabolic control problems in measure spaces, Julius-Maximilians-Universität Würzburg, June 5, 2012.
Parameteridentifizierung mit Impulsrauschen, Universität Duisburg-Essen, January 27, 2012.
Inverse problems with non-smooth noise models, Helmholtz Zentrum München, October 27, 2011.
A semi-smooth Newton method for nonlinear inverse problems with L1 data fitting, RICAM, Linz, February 18, 2011.
A primal-dual semi-smooth Newton method for nonlinear L1 data fitting, Institute of Computational Mathematics and Scientific/Engineering Computing, Chinese Academy of Sciences, Beijing, August 24, 2010.
PDE-constrained optimization with L1-type functionals, Institute of Computational Mathematics and Scientific/Engineering Computing, Chinese Academy of Sciences, Beijing, August 18, 2010.
PDE-constrained optimization with L1-type functionals, Universität Konstanz, April 14, 2010.
Inverse problems with L1 data fitting: A semismooth Newton method and automatic parameter choice, Johannes-Kepler Universität Linz, July 13, 2009.
Basic Principles of (P)MRI, Karl-Franzens-Universität Graz, December 3, 2008. (very informal; animations missing; caution: ~7MB)
Time Reversal and Thermoacoustic Tomography, Georg-August-Universität Göttingen, October 30, 2007.
A direct method for the numerical time reversal of waves in a heterogeneous medium, Karl-Franzens-Universität Graz, May 2, 2007.
A direct method for the numerical time reversal of waves in a heterogeneous medium, RICAM, Linz, March 6, 2007.