Conferences and talks

Forthcoming events

Invited plenary lecture: 15th International Conference on Numerical Optimization and Numerical Linear Algebra, Qiqihar, China, August 3-8, 2025
Member of the Scientific Committee: Viennese Conference on Optimal Control and Dynamic Games (VC2025), TU Wien, Austria, July 15-18, 2025
Invited plenary lecture: The International Conference on Mathematics and Its Applications, Timişoara, Romania, May 29-31, 2025
Invited lecture: International Conference on Variational Analysis, Optimization and Its Applications (ICOVAOpt-2025), Vietnam Institute for Advanced Study in Mathematics (VIASM), Hanoi, Vietnam, March 10-15, 2025
Invited lecture series: MATRIX workshop Splitting Algorithms – Advances, Challenges, and Opportunities, MATRIX Institute, The University of Melbourne, Australia, February 10-21, 2025
Invited lecture: Workshop on "Nonsmooth Optimization and Variational Analysis", The Hong Kong Polytechnic University, Hong Kong, December 2-4, 2024

2024

Invited lecture: Fast Continuous and Discrete Time Methods for Monotone Equations, Workshop on Proof Mining 2024, TU Darmstadt, Germany, September 4-6, 2024
Fast Continuous Time Methods for Monotone Equations, 25th International Symposium on Mathematical Programming (ISMP), Montréal, Canada, July 21-26, 2024
Invited plenary lecture: Fast Continuous and Discrete Time Methods for Monotone Equations and Variational Inequalities, International Conference on Mathematics and Computer Science (MACOS), Transilvania University of Braşov, Romania, June 13-15, 2024
Invited lecture: Fast Continuous Time Methods for Monotone Equations, Workshop on ADVANCES IN NONLINEAR ANALYSIS AND OPTIMIZATION, Erice, Italy, May 23-29, 2024
Invited lecture: Fast Optimistic Methods for Monotone Equations and Convex Optimization Problems, Computational Mathematics and Applications Seminar, University of Oxford, United Kingdom, May 9, 2024
Invited plenary lecture: Fast Continuous Time Methods for Monotone Equations, Workshop on Nonsmooth Optimization and Applications (NOPTA 2024), University of Antwerp, Belgium, April 8-13, 2024
Invited lecture: Fast Continuous Time Methods for Monotone Equations, AKOR Seminar, TU Wien, Austria, March 21, 2024
Training: How Do We Research in Exact Sciences?, Babeş-Bolyai University Cluj-Napoca, Romania, February 15-21, 2024

2023

Invited lecture (online): Fast Optimistic Continuous and Discrete Time Methods for Monotone Equations and Convex Optimization Problems, Nanjing University, China, December 20, 2023
Invited lecture: Fast Optimistic Continuous and Discrete Time Methods for Monotone Equations and Convex Optimization Problems, Workshop on "Nonsmooth Optimization and Variational Analysis", The Hong Kong Polytechnic University, Hong Kong, December 4-6, 2023
Invited lecture: Fast Optimistic Methods for Monotone Equations and Convex Optimization Problems, Oberseminar "Numerical Optimization", University of Konstanz, Germany, November 28, 2023
Invited lecture: Fast Optimistic Continuous and Discrete Time Methods for Monotone Equations, "Challenges in Continuous Optimization and its Applications: Celebrating Marc Teboulle’s 70th Birthday", Tel Aviv University, Israel, September 11-14, 2023
Fast Optimistic Gradient Descent Ascent method in Continuous and Discrete Time, 11th Applied Inverse Problems Conference, Göttingen, Germany, September 4-8, 2023
Invited plenary lecture: Fast Optimistic Continuous and Discrete Time Methods for Monotone Equations, 17th International Conference on Applied Mathematics and Computer Science, Technical University of Cluj-Napoca, Romania, July 11-13, 2023
Invited lecture (online): Fast Optimistic Continuous and Discrete Time Methods for Monotone Equations and Convex Optimization Problems, Research Seminar of the State Key Laboratory for Autonomous Intelligent Unmanned Systems, Beijing Institute of Technology, July 10, 2023
Invited lecture series: Numerical Methods for Convex and Nonconvex Optimization, 1st Alps-Adriatic Inverse Problems Summer School, University of Klagenfurt, Austria, July 3-4, 2023
Fast Optimistic Gradient Descent Ascent Method in Continuous and Discrete Time, SIAM Conference on Optimization, Seattle, USA, May 31-June 3, 2023
Invited lecture: Fast Continuous and Discrete Time Methods for Convex Optimization Problems with Linear Constraints, Optimization and Control in Burgundy, University of Dijon, France, May 9-11, 2023

2022

Invited lecture: Fast Continuous and Discrete Time Methods for Convex Optimization Problems with Linear Constraints, Optimization and Control in Burgundy, University of Dijon, France, May 9-11, 2023
Invited lecture: Fast Continuous and Discrete Time Methods for Convex Optimization Problems with Linear Constraints, Corvinus Operations Research Seminar, Corvinus University of Budapest, Hungary, November 24, 2022
Invited lecture: Fast Optimistic Gradient Descent Ascent Method in Continuous and Discrete Time, Online Conference "Numerical Analysis, Numerical Modeling, Approximation Theory (NA-NM-AT 2022)", Tiberiu Popoviciu Institute of Numerical Analysis (Romanian Academy), Cluj-Napoca, Romania, October 26-28, 2022
Special invited lecture: Fast Continuous and Discrete Time Methods for Convex Optimization Problems with Linear Constraints, RAMP Symposium on Mathematical Optimisation, Research Association of Mathematical Programming (RAMP) of the Operations Research Society of Japan, October 6, 2022
Invited lecture: Fast Optimistic Gradient Descent Ascent Method in Continuous and Discrete Time, International Seminar "Optimization and Variational Analysis" (OVA11), University of Alicante, Spain, September 22-23, 2022
Invited keynote lecture: Fast Primal-Dual Algorithms for Convex Optimization, International Conference on Digital Image Processing and Machine Learning (ICDIPML 2022), University of Phayao, Thailand, September 8-9, 2022
Invited keynote lecture: Fast Methods for Linearly Constrained Convex Optimization Problems in Continuous and Discrete Time, TraDE-OPT Workshop on Algorithmic and Continuous Optimization, Université catholique de Louvain, Belgium, July 4-8, 2022
Invited lecture (online): Fast Augmented Lagrangian Method in Continuous and Discrete Time, Logic, Optimization & Security Seminar, Faculty of Mathematics and Computer Science, University of Bucharest, Romania, June 28, 2022
Invited keynote lecture (online): Fast Augmented Lagrangian Method in Continuous and Discrete Time, The 7th International Conference on Optimization, Simulation and Control (ICOSC'2022), Ulaanbaatar, Mongolia, June 20-22, 2022
Invited keynote lecture: Fast Augmented Lagrangian Method in Continuous and Discrete Time, FGP’22 - French German Portuguese Conference on Optimization 2022, Porto, Portugal, May 3-6, 2022
Invited lecture (online): The Fast Augmented Lagrangian Method in Continuous and Discrete Time, Seminar on Variational Analysis and Optimization, University of Michigan, March 31, 2022
The Forward-Backward-Forward Algorithm for Solving Minimax Problems with Application to GANs, SIAM Conference on Imaging Science, Berlin, Germany, March 21-25, 2022

2021

Invited keynote lecture (online): Continuous Time Approaches to Structured Convex Minimization Problems, International Conference on Nonlinear Applied Analysis and Optimization, Varanasi, India, December 21-23, 2021
Invited keynote lecture (online): Continuous Time Approaches to Structured Convex Minimization Problems, Optimization Special Session of the 65th Annual Meeting of the Australian Mathematical Society, December 7-10, 2021
Invited lecture (online): Primal-Dual Dynamical Approaches to Structured Convex Minimization Problems, NCSU Differential Equations/Nonlinear Analysis Seminar, North Carolina State University, USA, October 27, 2021
Invited keynote lecture (online): Numerical Algorithms for Structured Nonsmooth and Nonconvex Optimization Problems, (Online) Continuous Optimization Stream of the UK 63rd Annual Conference in Operational Research, September 14-16, 2021
Invited lecture (online): Factorization of Completely Positive Matrices Using Iterative Projected Gradient Steps, Optimization: Theory, Algorithms, Applications Lecture Series, Fields Institute, Toronto, and University of Waterloo, Canada, September 9, 2021
Inertial Proximal Block Coordinate Method for Nonsmooth and Nonconvex Sum-of-Ratios Optimization SIAM Conference on Optimization, July 20-23, 2021
Invited lecture (online): Continuous and Discrete Time Approaches to Nonsmooth Nonconvex Optimization Problems, Brazilian Optimization Seminar, March 23, 2021

2020

Invited lecture (online): A Primal-Dual Dynamical Approach to Structured Convex Minimization Problems, "VARIATIONAL METHODS IN NONLINEAR PHENOMENA", University of Naples Federico II, Italy, September 23-25, 2020

2019

Invited lecture: A Primal-Dual Dynamical Approach to Structured Convex Minimization Problems, Workshop "Nonsmooth Optimization", Special Semester on Optimization, RICAM, Linz, Austria, November 25-27, 2019
Invited lecture: A Primal-Dual Dynamical Approach to Structured Convex Minimization Problems, Séminaire Pluridisciplinaire d'Optimisation de Toulouse, Toulouse, France, November 18, 2019
Invited semi-plenary lecture: Proximal Algorithms for Nonsmooth Nonconvex Optimization, The Sixth International Conference on Continuous Optimization (ICCOPT 2019), Berlin, Germany, August 5-8, 2019
Invited lecture: A Primal-Dual Dynamical Approach to Structured Convex Minimization Problems, 2019 CUHK-Shenzhen Workshop on Optimization Theory and Applications, Shenzhen, China, July 31 - August 2, 2019
Some Open Questions About the Minimization of Structured Nonsmooth and Nonconvex Functions, 71st Workshop ADVANCES IN NONSMOOTH ANALYSIS AND OPTIMIZATION of the International School of Mathematics G. Stampacchia, Erice, Italy, 24 June - 1 July, 2019
Invited lecture: Proximal Algorithms for Nonconvex and Nonsmooth Minimization Problems, Research Seminar Series in Statistics and Mathematics, Vienna University of Economics and Business, Vienna, May 3, 2019
Invited lecture: Four (Plus One) Open Questions About the Minimization of Structured Nonsmooth and Nonconvex Functions, 2nd Workshop on "Operator Splitting Methods in Data Analysis", Flatiron Institute, New York, USA, March 20-22, 2019

2018

Invited lecture: Proximal Algorithms for Nonconvex and Nonsmooth Optimization Problems, The Annual Workshop of the CNRS Group of Research "Mathematics of Optimization and Applications", University of Pau, France, October 17-19, 2018
Invited plenary lecture: A General Double-Proximal Gradient Algorithm for D.C. Programming, IX International Conference Optimization and Applications (OPTIMA-2018), Petrovac, Montenegro, October 1-5, 2018
Invited lecture: A Proximal Minimization Algorithm for Structured Nonconvex and Nonsmooth Problems, The 10th Asian Conference on Fixed Point Theory and Optimization, Chiang Mai University, Thailand, July 16-18, 2018
Invited lecture: Primal-Dual Splitting Algorithms: From Convex to Nonconvex Optimization Problems, Workshop on “New Trends in Optimization”, Naresuan University, Phitsanulok, Thailand, July 13, 2018
The Continuous Proximal-Gradient Approach in the Nonconvex Setting, The 23rd International Symposium on Mathematical Programming, Bordeaux, France, July 1-6, 2018
Invited lecture: A Proximal Minimization Algorithm for Structured Nonconvex and Nonsmooth Problems, DIMACS Workshop on ADMM and Proximal Splitting Methods in Optimization, DIMACS Center, Rutgers University, NJ, USA, June 11-13, 2018
The Proximal Alternating Direction Method of Multipliers in the Nonconvex Setting: Convergence Analysis and Rates, The 9th International Conference "Inverse Problems: Modeling and Simulation", Malta, May 21-25, 2018
Invited lecture: On the Boundedness of the Sequence of Iterates Generated by the Nonconvex ADMM Algorithm, Workshop on "Operator Splitting Methods in Data Analysis", SAMSI, Raleigh, NC, USA, March 21-23, 2018

2017

Invited lecture: ADMM for Monotone Operators: Convergence Analysis and Rates, "German-Israeli Research Workshop on Optimization", Technion Haifa, Israel, October 16-19, 2017
Invited lecture series: Splitting Algorithms in Nonsmooth Convex and Nonconvex Optimization, Autumn School on Nonsmooth Structures in Mathematical Models 2017, WIAS Berlin, Germany, October 11-14, 2017
Invited lecture: The Inertial Proximal-Gradient Algorithm for Nonconvex Nonsmooth Optimization Problems, Annual Meeting of the DFG Priority Programme 1962, Hotel Sommerfeld, Kremmen, Germany, October 9-11, 2017
Invited lecture: A General Double-Proximal Gradient Algorithm for D.C. Programming, Workshop on "Splitting Algorithms, Modern Operator Theory, and Applications", Casa Matematica Oaxaca, Oaxaca, Mexico, September 17-22, 2017
Invited plenary lecture: Proximal Algorithms for Nonconvex Nonsmooth Optimization Problems with KL Functions, 7th German-Polish Conference on Optimization, Bedlewo, Poland, August 28 - September 2, 2017
Invited lecture: A General Double-Proximal Gradient Algorithm for D.C. Programming, The Third International Conference on Engineering and Computational Mathematics (ECM2017), Hong Kong Polytechnic University, May 31 - June 2, 2017
Invited lecture: The Proximal-Gradient Algorithm for Fractional Programming: Convergence Analysis and Rates, 2017 HKBU Workshop on Optimization, Hong Kong Baptist University, May 30, 2017
Invited lecture: The Proximal-Gradient Approach in the Nonconvex Setting From Both a Discrete and Continuous Perspective, Workshop on "Nonsmooth optimization and its applications", Hausdorff Center for Mathematics, Bonn, Germany, May 15-19, 2017
Invited lecture: Convex Optimization Methods for Signal Processing, Seminar of the Numerical Harmonic Analysis Group, University of Vienna, Austria, March 15, 2017
Invited lecture: On the Minimization of the Sum of a Nonsmooth with a Smooth Function in the Nonconvex Setting, Research Seminar Optimization and Approximation, Faculty of Mathematics, Chemnitz University of Technology, January 25, 2017

2016

Invited lecture: The Minimization of the Sum of a Nonsmooth with a Nonconvex Smooth Function from Both a Continuous and Discrete Perspective, International Workshop "New Trends in Optimization and Variational Analysis for Applications", Quy Nhon, Vietnam, December 7-10, 2016
Invited lecture: Proximal-Gradient Algorithms for Fractional Programming, Seminar of the Research Group on Analysis and Optimization, "Babeş - Bolyai" University Cluj-Napoca, Romania, November 3, 2016
Invited lecture: Primal-Dual Algorithms for Convex Optimization Problems with Complex Structures, MOD Seminar, XLIM Research Institute, University of Limoges, France, September 30, 2016
Invited lecture: Proximal-Gradient Algorithms for Fractional Programming, International Workshop "Advances in Convex Analysis and Optimization", International School of Mathematics G. Stampacchia, Erice, Italy, July 5 - July 12, 2016
Invited lecture: Primal-dual Splitting Algorithms for Convex Optimization with Applications to Image Processing, CEMSE Seminar, KAUST, Saudi Arabia, June 5, 2016
Invited lecture: Primal-Dual Proximal-Type Algorithms for the Minimization of Complexly Structured Nonsmooth Convex Functions, The 7th International Seminar on Optimization and Variational Analysis (OVA7), Alicante, Spain, June 1-3, 2016
Invited lecture series: Recent Advances in Numerical Algorithms for Convex Optimization, KTH Royal Institute of Technology, Stockholm, Sweden, May 15-18, 2016
Invited lecture: A Primal-Dual Douglas-Rachford Type Algorithm for Nonsmooth Convex Optimization Problems with Complex Structures, Seminar of the Research Group on Analysis and Optimization, "Babeş - Bolyai" University Cluj-Napoca, Romania, March 24, 2016
Invited lecture: A Proximal-Gradient Algorithm for the Minimization of the Sum of Two Nonconvex Functions, Workshop "Inverse Problems in the ALPS", Obergurgl, Austria, March 15-19, 2016
Invited lecture: Primal-Dual Splitting Algorithms for Convex Optimization with Applications to Image Processing, Acoustics Research Institute, Vienna, Austria, February 24, 2016

2015

Invited lecture: Primal-Dual Splitting Algorithms for Convex Optimization with Applications to Image Processing, Faculty of Mathematics and Information Science, Warsaw University of Technology, Warsaw, Poland, December 2, 2015
Invited lecture: A Douglas-Rachford Type Algorithm for Nonsmooth Convex Optimization Problems with Complex Structures, Institute of Mathematics of the Polish Academy of Sciences, Warsaw, Poland, December 1, 2015
Invited plenary lecture: A Douglas-Rachford Type Algorithm for Nonsmooth Convex Optimization Problems with Complex Structures, 12 International Seminar on Optimization and Related Areas, Lima, Peru, October 5-9, 2015
Invited lecture series: Recent Developments in Convex Optimization, Naresuan University, Phitsanulok, Thailand, September 14-16, 2015
Invited lecture: Splitting Algorithms for Nonsmooth Convex Optimization Problems with Complex Structures, Faculty of Science, King Mongkut's University of Technology Thonburi (KMUTT), Bangkok, Thailand, September 13, 2015
Invited lecture: On the Solving of Nonsmooth Convex Optimization Problems with Complex Structures, International Workshop "Variational Analysis and Applications", International School of Mathematics G. Stampacchia, Erice, Italy, August 28 - September 5, 2015
Invited lecture: Primal-Dual Algorithms for Complexly Structured Nonsmooth Convex Optimization Problems, International Conference on Nonlinear Operators, Differential Equations and Applications, Cluj-Napoca, Romania, July 14-17, 2015
Invited lecture: Splitting-Verfahren zur Lösung von nichtglatten konvexen Optimierungsaufgaben mit komplexen Strukturen, Universität Siegen, Germany, July 8, 2015
Invited lecture: Primal-Dual Algorithms for Complexly Structured Nonsmooth Convex Optimization Problems, The Eighth Congress of Romanian Mathematicians, Iaşi, Romania, June 26 - July 1, 2015
Invited lecture: Qualification Conditions Formulated via the Quasi-Relative Interior in Convex Programming, Fitzpatrick Workshop, South Pacific Continuous Optimization Meeting (SPCOM 2015), Adelaide, Australia, February 8-12, 2015
Invited plenary lecture: Primal-Dual Methods for Solving Complexly Structured Nonsmooth Convex Optimization Problems, South Pacific Continuous Optimization Meeting (SPCOM 2015), Adelaide, Australia, February 8-12, 2015
Invited lecture: A Splitting Method for Solving Complexly Structured Nonsmooth Convex Optimization Problems, Friedrich-Schiller-Universität Jena, Germany, January 9, 2015

2014

Invited lecture series: Proximal Splitting Methods in Convex Optimization, German-Mongolian Institute for Resources and Technology, Ulan Bator, Mongolia, September 10-11, 2014
Invited lecture: On Primal-Dual Splitting Algorithms for Monotone Inclusions with Applications to Convex Optimization, Department of Applied Mathematics, National Sun Yat-sen University, Kaohsiung, Taiwan, July 9, 2014
Invited lecture: Primal-duale Splitting-Verfahren zur Lösung von nichtglatten konvexen Optimierungsaufgaben, Universität Augsburg, Germany, May 30, 2014
Forward-Backward and Tseng's Type Penalty Schemes for Monotone Inclusion Problems, SIAM Conference on Optimization, San Diego, USA, May 19-22, 2014 (co-author: E.R. Csetnek)
Invited lecture: Primal-duale Splitting-Verfahren für monotone Inklusionen und deren Anwendung in der konvexen Optimierung, Universität Heidelberg, Germany, January 16, 2014
Antrittsvorlesung: Convex Optimization from the Perspective of Maximal Monotone Operators, Universität Wien, Austria, January 15, 2014

2013

Invited lecture: Primal-duale Splitting-Verfahren für monotone Inklusionen und deren Anwendung in der konvexen Optimierung, Universität Mannheim, Germany, November 14, 2013
Invited plenary lecture: On primal-dual splitting algorithms for monotone inclusions with applications to convex optimization, 9th International Conference on Applied Mathematics, Baia Mare, Romania, September 25-28, 2013
A Primal-Dual Splitting Algorithm for Finding Zeros of Sums of Maximally Monotone Operators, 26th IFIP TC7 Conference 2013 on System Modelling and Optimization, Klagenfurt, Austria, September 8-13, 2013 (co-author: E.R. Csetnek, A. Heinrich)
Invited lecture: Approaching the Maximal Monotonicity of Bifunctions via Representative Functions, South Pacific Optimization Meeting, Newcastle, Australia, February 9-12, 2013
Invited lecture: Convex Analysis in Imaging, Optimization of Planet Earth Afternoon, Mathematics of Planet Earth 2013, Newcastle, Australia, February 9-12, 2013

2012

Invited lecture: A Fenchel Duality-Based Double Smoothing Technique for Solving Convex Optimization Problems with Applications to Image Processing, Canberra Symposium on Regularisation Integrating Chemnitz Symposium on Inverse Problems on Tour, Canberra, Australia, November 19-24, 2012
Invited lecture: Monotone Operatoren aus dem Blickwinkel der konvexen Optimierung, Universität Salzburg, Austria, November 6, 2012
Invited lecture: Auf Fenchel-Dualität basierende Regularisierungstechniken zur Lösung nichtdifferenzierbarer konvexer Optimierungsaufgaben mit Anwendungen in der Bildverarbeitung, Johannes Kepler Universität Linz, Austria, October 22, 2012
Approaching the Maximal Monotonicity of Bifunctions via Representative Functions, 21st International Symposium on Mathematical Programming, Berlin, Germany, August 19-24, 2012 (co-author: S.-M. Grad)
Invited lecture: Auf Fenchel-Dualität basierende doppelte Regularisierungstechniken zur Lösung nichtdifferenzierbarer konvexer Optimierungsaufgaben mit Anwendungen in der Bildverarbeitung, Forschungsseminar Algorithmische und Diskrete Mathematik, Fakultät für Mathematik, Technische Universität Chemnitz, Chemnitz, Germany, June 27, 2012
Approaching the Maximal Monotonicity of Bifunctions via Representative Functions, Constructive Nonsmooth Analysis and Related Topics, Euler International Mathematical Institute, St. Petersburg, Russia, June 18-23, 2012 (co-author: S.-M. Grad)
Invited lecture series: Convex Analysis with Applications in Inverse Problems, Institut für Numerische und Angewandte Mathematik, Georg-August-Universität Göttingen, Germany, June 11-14, 2012
Invited lecture: Auf Fenchel-Dualität basierende doppelte Regularisierungstechniken zur Lösung nichtdifferenzierbarer konvexer Optimierungsaufgaben mit Anwendungen in der Bildverarbeitung, Universität zu Köln, Germany, May 07, 2012
Invited lecture: Techniken der doppelten Regularisierung zur Lösung konvexer Optimierungsaufgaben mit Anwendung in der Bildverarbeitung, Universität Koblenz-Landau, Germany, March 22, 2012
Invited lecture: Über die Implementierung von doppelten Regularisierungstechniken zur Lösung nichtdifferenzierbarer konvexer Optimierungsaufgaben, Universität Bremen, Germany, January 31, 2012
Invited lecture: Über die Implementierung von doppelten Regularisierungstechniken zur Lösung nichtdifferenzierbarer konvexer Optimierungsaufgaben, Ernst-Moritz-Arndt-Universität Greifswald, Germany, January 27, 2012
Invited lecture: A Fenchel Duality-Based Double Smoothing Technique for Solving Convex Optimization Problems, Seminar on Applied Mathematics, Institute for Numerical and Applied Mathematics, Georg-August-Universität Göttingen, Germany, January 24, 2012
Invited lecture: A Double Smoothing Technique for Solving Convex Optimization Problems with Applications to Image Processing, Leopold-Franzens-Universität Innsbruck, Austria, January 12, 2012
Invited lecture: A Fenchel Duality-Based Approach for Solving Optimization Problems Arising in Supervised Learning, Konrad-Zuse-Zentrum für Informationstechnik, Berlin, Germany, January 5, 2012

2011

Invited lecture: Monotone Operatoren aus dem Blickwinkel der konvexen Optimierung, Fakultät für Mathematik, Informatik und Naturwissenschaften, RWTH Aachen, Germany, December 12, 2011
Approaching the Maximal Monotonicity of Bifunctions via Representative Functions, International Conference on Optimization, Theory, Algorithms and Applications in Economics, Centre de Recerca Matemàtica, Barcelona, Spain, October 24-28, 2011 (co-author: S.-M. Grad)
Invited lecture: A Fenchel Duality-Based Approach for Solving Optimization Problems Arising in Supervised Learning, Applied Mathematics Seminar, University of New South Wales, Sydney, Australia, September 22, 2011
Error Bound Results for Convex Inequality Systems Via Conjugate Duality, 10th International Symposium on Generalized Convexity/Monotonicity, Cluj-Napoca, Romania, August 22-27, 2011 (co-author: E.R. Csetnek)
Invited lecture: Konjugierte Dualität bei konvexen Optimierungsaufgaben und darüber hinaus, Fakultät für Mathematik und Naturwissenschaften, Technische Universität Ilmenau, Germany, April 8, 2011
Invited lecture: Über die Rolle der Qualifikationsbedingungen bei der Herleitung von dualen Darstellungen für konvexe Risikomaße, Kolloquium des Instituts für Operations Research, Karlsruhe Institut of Technology, Karlsruhe, Germany, January 20, 2011

2010

On a Zero Duality Gap Result in Extended Monotropic Programming, International Conference on Advances in Optimization and Related Topics, Centre de Recerca Matemàtica, Barcelona, Spain, November 29 - December 3, 2010 (co-author: E.R. Csetnek)
Invited lecture: Konjugierte Dualität in der konvexen Optimierung. Theoretische Aspekte und Anwendungen im maschinellen Lernen, Technische Universität Hamburg-Harburg, Germany, October 25, 2010
Invited lecture: Konjugierte Dualität bei konvexen Optimierungsaufgaben und darüber hinaus, Fakultät für Mathematik, Otto-von-Guericke-Universität Magdeburg, Germany, October 11, 2010
Invited lecture: Conjugate Duality in Convex Optimization and Beyond, 7th International Conference on Applied Mathematics, Minisymposium Optimization Theory, Operations Research and Applications, Baia Mare, Romania, September 1-4, 2010
On a Zero Duality Gap Result in Extended Monotropic Programming, 24th European Conference on Operational Research, Lisbon, Portugal, July 11-14, 2010 (co-author: E.R. Csetnek)
On the Weak* Closedness of the Sum of the Images of Enlargements of Two Maximal Monotone Operators, 8th EUROPT Workshop on Advances in Continuous Optimization, Aveiro, Portugal, July 9-10, 2010 (co-author: E.R. Csetnek)
Invited lecture: Konjugierte Dualität bei konvexen Optimierungsaufgaben und darüber hinaus, Fakultät für Mathematik, Universität Dortmund, Germany, July 5, 2010
Invited lecture: Konjugierte Dualität bei konvexen Optimierungsaufgaben und darüber hinaus, Fakultät für Mathematik, Informatik und Naturwissenschaften, Universität Hamburg, Germany, July 2, 2010
On a Zero Duality Gap Result in Extended Monotropic Programming, 4th Workshop on Optimization and Variational Analysis, Elche, Spain, June 14-16, 2010 (co-author: E.R. Csetnek)
Invited lecture: Conjugate Duality in Convex Optimization and Beyond, Institute of Science and Technology Austria, Klosterneuburg, Austria, June 11, 2010
Invited lecture: Konjugierte Dualität bei konvexen Optimierungsaufgaben und darüber hinaus, Abteilung Mathematik des Fachbereichs IV, Universität Trier, Germany, June 8, 2010
Invited lecture: On Some Quasi-Relative Interior-Type Qualification Conditions in Convex Programming, Oberseminar Optimierung, Institut für Mathematik, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany, April 27, 2010

2009

Invited lecture: Konjugierte Dualität bei konvexen Optimierungsaufgaben und darüber hinaus, Forschungsseminar Partielle Differentialgleichungen und Inverse Probleme, Fakultät für Mathematik, Technische Universität Chemnitz, Chemnitz, Germany, December 4, 2009
Invited lecture: Konjugierte Dualität bei konvexen Optimierungsaufgaben und darüber hinaus, Fakultät für Mathematik und Wirtschaftswissenschaften, Universität Ulm, Germany, November 25, 2009
Invited lecture: On Fenchel Duality and some of Its Variants, 09w5006 Interdisciplinary Workshop on Fixed-Point Algorithms for Inverse Problems in Science and Engineering, Banff International Research Station for Mathematical Innovation and Discovery, Banff, Canada, November 1-6, 2009
Invited lecture: An Application of the Bivariate Inf-Convolution Formula to Enlargements of Monotone Operators, OCANA Seminar Series, UBC Okanagan, Kelowna, Canada, October 29, 2009 (co-author: E.R. Csetnek)
Invited lecture: Minimality via Convex Subdifferential Calculus: the Role of the Regularity Conditions, Chemnitz-RICAM-Symposium on Inverse Problems, Linz, Austria, July 14-15, 2009
On Two Variants of Fenchel Duality: Stable and Totally Unstable Duality, 23rd European Conference on Operational Research, Bonn, Germany, July 5-8, 2009 (co-author: E.R. Csetnek)
Regularity Conditions via Quasi-Relative Interior for Fenchel and Lagrange Duality in Convex Programming, 7th EUROPT Workshop on Advances in Continuous Optimization, Remagen, Germany, July 3-4, 2009 (co-authors: E.R. Csetnek und A. Moldovan)
Invited lecture: Recent Achievements and Challenges Regarding Conjugate Duality in Convex Optimization, Faculty of Mathematics and Computer Sciences of the "Babeş - Bolyai" University Cluj-Napoca, Cluj-Napoca, Romania, June 25, 2009
On Totally Fenchel Unstable Functions, The Sixth International Conference on Nonlinear Analysis and Convex Analysis, Tokyo, Japan, March 27-31, 2009 (co-authors: E.R. Csetnek and A. Löhne)
Invited lecture: Konjugierte Dualität in der konvexen Optimierung, Naturwissenschaftliche Fakultät, Friedrich-Alexander-Universität Erlangen-Nürnberg, Germany, January 8, 2009

2008

Invited lecture: Conjugate Duality in Convex Optimization. Theoretical Aspects and some Applications in Machine Learning, Dipartimento di Informatica e Scienze dell'Informazione, University of Genova, Genova, Italy, September 23, 2008 (co-authors: A. Heinrich and N. Lorenz)
The Quasi-Relative Interior in Convex Programming: Regularity Conditions and Duality Theorems, Fifth World Congress of Nonlinear Analysts, Orlando, USA, July 2-9, 2008 (co-authors: E.R. Csetnek and A. Moldovan)
On Two Open Problems Regarding Totally Fenchel Unstable Functions, International School of Mathematics "Guido Stampacchia", 48th Workshop: Nonsmooth Analysis Optimization and Applications, Erice, Italy, May 9-17, 2008 (co-authors: E.R. Csetnek and A. Löhne)
Invited lecture: On Two Open Problems Regarding Totally Fenchel Unstable Functions, Dipartimento di Matematica Applicata U.Dini, University of Pisa, Pisa, Italy, January 24, 2008 (co-authors: E.R. Csetnek, A. Löhne and S. Simons)

2007

Invited lecture: A New Condition for Maximal Monotonicity via Representative Functions, International Conference on Continuous Optimization - Modelling and Optimization: Theory and Applications 2007 - ICCOPT 07-MOPTA 07, McMaster University, Hamilton, Canada, August 13-16, 2007 (co-authors: E.R. Csetnek and G. Wanka)
Invited plenary lecture: Closedness Type Regularity Conditions in Convex Optimization, 6th Congress of Romanian Mathematicians, Bucharest, Romania, June 28 - July 4, 2007
Regularity Conditions Via Quasi-Relative Interior in Convex Progamming, The Fifth International Conference on Nonlinear Analysis and Convex Analysis, Hsinchu, Taiwan, May 31 - June 4, 2007 (co-authors: E.R. Csetnek and G. Wanka)
Sequential Optimality Conditions in Convex Programming Via Perturbation Approach, CODE 2007: Conférence de la SMAI sur l'Optimisation et la Décision, Institut "Henri Poincaré", Paris, France, April 18-20, 2007 (co-authors: E.R. Csetnek and G. Wanka)

2006

Invited lecture: A New Regularity Condition for Subdifferential Calculus and Fenchel Duality in Infinite Dimensional Spaces. Applications for Maximal Monotone Operators, Seminario Mario Volpato, Department of Applied Mathematics, University Ca' Foscari Venezia, Venice, Italy, September 28, 2006 (co-author: G. Wanka)
Invited lecture: A New Regularity Condition for Subdifferential Calculus and Fenchel Duality in Infinite Dimensional Spaces, Dipartimento di Matematica, University of Pisa, Pisa, Italy, September 22, 2006 (co-author: G. Wanka)
Brézis-Haraux-Type Approximation of the Range of a Monotone Operator Composed with a Linear Mapping, International Conference on Applied Analysis and Differential Equations, Iaşi, Romania, September 4-9, 2006 (co-authors: S.M. Grad and G. Wanka)
Brézis-Haraux-Type Approximation of the Range of a Monotone Operator Composed with a Linear Mapping, INTAS Summer School - Nonlinear Analysis with Applications in Economics, Energy and Transportation, Bergamo, Italy, June 5-9, 2006 (co-authors: S.M. Grad and G. Wanka)
Maximal Monotonicity for the Precomposition with a Linear Operator, International Conference on Mathematics of Optimization and Decision Making, Point-a-Pitre, Guadeloupe, April 18-21, 2006 (co-authors: S.M. Grad and G. Wanka)

2005

A Weak Regularity Condition for Subdifferential Calculus and Fenchel Duality in Infinite Dimensional Spaces, International Conference in Memoriam Gyula Farkas, Cluj-Napoca, Romania, August 23-26, 2005 (co-author: G. Wanka)
A New Constraint Qualification for the Formula of the Conjugate of Composed Functions in Infinite Dimensional Spaces, 8th International Symposium on Generalized Convexity and Generalized Monotonicity, Varese, Italy, July 4-8, 2005 (co-authors: S.M. Grad and G. Wanka)

2004

Invited lecture: On a New Closed Cone Constraint Qualification, Research Seminar of the Department of Analysis and Optmization, Faculty of Mathematics and Computer Sciences of the "Babeş - Bolyai" University Cluj-Napoca, Cluj-Napoca, Romania, November 4, 2004 (co-author: G. Wanka)
Fenchel-Lagrange versus Geometric Duality in Convex Optimization, 12th French-German-Spanish Conference on Optimization, Avignon, France, September 20-24, 2004 (co-authors: S.M. Grad and G. Wanka)

2002

An Analysis of Dual Problems in Multiobjective Optimization (II), IV Brasilian Workshop on Continuous Optimization, Rio de Janeiro, Brazil, July 15-20, 2002 (co-author: G. Wanka)
Invited lecture: Duality for Multiobjective Convex Semidefinite Programming Problems, Kollegseminar im Graduiertenkolleg GKAAM, München, Germany, May 13, 2002 (co-authors: S.M. Grad and G. Wanka)
Duality for the Location Model Involving Sets as Existing Facilities, The 12-th Workshop of the GOR-Working Group "Decision Theory and Practice", Hohenheim, Germany, March 21-23, 2002 (co-author: G. Wanka)

2001

An Application of the Theory of Duality for Support Vector Machines, The Annual Meeting of the Fellowship Holders of "Gottlieb Daimler- und Karl Benz-Stiftung", Willebadessen, Germany, September 14-16, 2001
A New Duality Approach for Convex Optimization Problems, Optimization 2001, Aveiro, Portugal, July 23-25, 2001 (co-author: G. Wanka)
A New Duality Approach for Multiobjective Convex Optimization Problems, The Workshop of the Ph. D. students in optimization from Saxony, Freiberg, Germany, July 17, 2001 (co-author: G. Wanka)

2000

Multiobjective Duality for Convex Ratios, The 10-th Workshop of the GOR-Working Group "Decision Theory and Practice", Seeheim, Germany, March 16-18, 2000 (co-author: G. Wanka)