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Talks


Conference talks

  1. Upcoming September 2019: Invited Speaker, MAT TRIAD 2019 International Conference on Matrix Analysis and its Applications, Liblice, Czech Republic.
  2. Upcoming March 2019: Invited Speaker, Workshop Women in Optimization - WiO 2019, Bonn, Germany.
  3. 26.07.2018: Invited Speaker, XII Brazilian Workshop on Continuous Optimization: Conic optimization approaches to combinatorial problemsFoz do Iguaçu, Brazil.
  4. 05.07.2018: ISMP2018: A robust approach to stratified sampling allocation problems. Bordeaux, France.
  5. 07.09.2017: OR2017: A factorization method for completely positive matrices based on alternating projections. Berlin, Germany.
  6. 24.05.2017: SIAM Conference on Optimization 2017: A Factorization Method for Completely Positive Matrices. Vancouver, Canada.
  7. 08.09.2016: 5th IMA Conference on Numerical Linear Algebra and Optimization: A factorization method for completely positive matrices. Birmingham, UK.
  8. 08.08.2016: Semiplenary Talk, ICCOPT2016: Copositive optimization. Tokyo, Japan.
  9. 04.05.2016: ICBO16: Genericity and stability results in linear conic programming. Dresden, Germany.
  10. 21.10.2015 Invited Talk, Workshop for Mixed-integer Nonlinear Optimization: A factorization heuristic for completely positive matrices. Oberwolfach Mathematical Institute, Germany.
  11. 03.09.2015: OR2015: Solution methods for black-box optimization problems. Vienna, Austria.
  12. 22.07.2015: Plenary Talk, MOPTA2015: Copositive programming: a framework for quadratic and combinatorial optimization. Lehigh University in Bethlehem, PA, USA.
  13. 16.07.2015: ISMP2015: Genericity and Stability in Linear Conic Programming. Pittsburgh, USA.
  14. 15.12.2014: VOCAL 2014: Infinite dimensional copositive optimization. Veszprem, Hungary.
  15. 20.05.2014: SIAM Conference on Optimization 2014: Cutting planes for completely positive conic problems. San Diego, USA.
  16. 05.09.2013: OR 2013: Cutting planes for completely positive conic problems. Rotterdam, The Netherlands.             
  17. 28.06.2013: EUROPT 2013: A copositive formulation for the stability number of infinite graphs. Florence, Italy.
  18. 15.11.2012: Invited Talk, 2012 Haifa Matrix Theory Conference: The use of copositive and completely positive matrices in optimization. Haifa, Israel.
  19. 05.09.2012: OR 2012: Infinite dimensional semidefinite programming. Hannover, Germany.
  20. 20.08.2012: ISMP 2012: Remarks on copositive plus matrices and the copositive plus completion problem. Berlin, Germany.
  21. 11.01.2012: Invited Talk, LAWOC 2012: A copositive formulation for the stability number of infinite graphs. Valparaiso, Chile.
  22. 17.06.2011: Invited Talk, SIGOPT 2011: Recent Developments in Copositive Programming. PfalzAkademie Lambrecht, Germany.
  23. 18.05.2011: SIAM Conference on Optimization: Complexity Issues in Copositive Optimization. Darmstadt, Germany.
  24. 13.07.2010: EURO XXIV: A d.c.-approach to copositivity. Lisbon, Portugal.
  25. 10.07.2010: Invited Plenary Talk, 8th EUROPT Workshop "Advances in Continuous Optimization": Optimally Fitting Hyperplanes to Data. Aveiro, Portugal.
  26. 15.06.2010: Invited Talk, HPOPT 2010: Recent Progress in Copositive Programming. Tilburg University, The Netherlands.
  27. 27.05.2010: Invited Talk, DIAMANT Symposium: Copositive Programming. Nunspeet, The Netherlands.
  28. 05.01.2010: Invited Talk, Workshop "Convex Analysis, Optimization and Applications", held on the occasion of the 65th birthday of Claude Lemaréchal: Solving quadratic problems by copositive optimization. Les Houches, France.
  29. 15.09.2009: Invited Plenary Talk, 14th Belgian-French-German Conference on Optimization: Copositive Programming. Leuven, Belgium.
  30. 28.08.2009: International Symposium on Mathematical Programming 2009: The Difference Between 5 x 5 Doubly Nonnegative and Completely Positive Matrices. Chicago, USA.
  31. 04.07.2009: EUROPT Workshop on Continuous Optimization 2009: The Difference Between 5 x 5 Doubly Nonnegative and Completely Positive Matrices. Remagen, Germany.
  32. 03.09.2008: Operations Research 2008: Packing Solar Cells on a Roof. Augsburg, Germany.
  33. 23.05.2008: Invited Plenary Talk, EURO MiniConference on Optimization: Discrete Nonlinear Optimization in a Conic Programming Framework. Neringa, Lithuania.
  34. 13.05.2008:SIAM Conference on Optimization: An Adaptive Algorithm for Copositive Programs. Boston, USA.
  35. 18.02.2008: SIGOPT 2008: Optimization over Convex Cones: Beyond Semidefinite Programming. PfalzAkademie Lambrecht, Germany.
  36. 18.09.2007: 13th Czech-French-German Conference on Optimization Neutral Data Fitting. Heidelberg, Germany.
  37. 06.09.2007: Operations Research 2007: Neutral Data Fitting. Saarbrücken, Germany.
  38. 11.07.2007: EURO XXII (22nd European Conference on Operational Research): Relaxations and Dual Bounds for Quadratic Problems. Prague, Czech Republic.
  39. 06.07.2007: Joint EUROPT-OMS Meeting: Linear Approximations of Copositive Programs. Prague,Czech Republic.
  40. 13.12.2006: Veszprem Optimization Conference: Advanced Algorithms (VOCAL): Towards Solving Copositive Programs. Veszprem, Hungary.
  41. 16.11.2006: BIRS Optimization and Engineering Applications Workshop: Solving Copositive Programs through Linear Approximations. Banff International Research Station for Mathematical Innovation and Discovery, Canada.
  42. 07.09.2006: Operations Research 2006: Linear Approximations of Copositive Programs. Karlsruhe, Germany.
  43. 05.07.2006: EURO XXI (21st European Conference on Operational Research): An Algorithm for Multiple Neutral Data Fitting. Reykjavik, Iceland.
  44. 16.12.2005: International Workshop on Discrete-Continuous Optimization and Optimal Control: Branch-and-Bound Approaches to Mixed Integer Nonlinear Programming. Darmstadt, Germany.
  45. 18.09.2005: International Workshop on Global Optimization: Multiple Neutral Data Fitting. Almeria, Spain.
  46. 08.11.2004: Workshop on Integer Programming and Continuous Optimization: Probabilistic Subproblem Selection in Branch-and-Bound Algorithms. TU Chemnitz, Germany.
  47. 05.07.2004: EURO XX (20th European Conference on Operational Research): A Stochastic Approach to Fractional Programming. Rhodos, Greece.
  48. 03.07.2004: Workshop on Challenges of Continuous Optimization in Theory and Applications: Duality in Optimization: From Convex to Nonconvex Problems. Rhodos, Greece.
  49. 26.09.2003: Joint Meeting of the Austrian Mathematical Society (ÖMG) with SIMAI and UMI: A Stochastic Algorithm for Global Optimization. Bolzano, Italy.
  50. 19.08.2003: ISMP 2003: Solving Fractional Programs with Stochastic Algorithms. Copenhagen, Denmark.
  51. 07.07.20 03: EURO/INFORMS Joint International Meeting 2003: Probabilistic Subset Selection in Branch-and-Bound Algorithms. Istanbul, Turkey.
  52. 04.06.2003: CORS/SCRO 2003 (45th Annual Conference of the Canadian Operational Research Society): Solving Fractional Programs with Stochastic Algorithms. Vancouver, Canada.
  53. 10.05.2003: West Coast Optimization Meeting: Probabilistic Subset Selection in Branch-and-Bound Algorithms. University of Washington, Seattle, USA.
  54. 09.09.2002: French-German-Polish Conference on Optimization: Probabilistic Subset Selection in Branch-and-Bound Algorithms. TU Cottbus, Germany.
  55. 04.09.2002: International Conference on Operations Research 2002: Nonconvex Duality: Theory and Applications. Universität Klagenfurt, Austria.
  56. 05.07.2001: Optimization and Industry Conference: On Copositive Programming and Standard Quadratic Optimization Problems. Central Queensland University, Australia.
  57. 07.08.2000: ISMP 2000: Dual Bounding Procedures Lead to Convergent Branch-and-Bound Algorithms. Georgia Institute of Technology, Atlanta, USA.
  58. 05.05.2000: Workshop "Complex Behavior in Economics": Maximizing a Sum of Fractions. CEFI, Université de la Mediterranée, Aix-en-Provence.
  59. 30.09.1999: International Workshop on Global Optimization - GO.99: Dual Bounding Procedures in Branch-and-Bound Algorithms. Università di Firenze.
  60. 07.09.1999: Jahrestagung der Deutschen Mathematikervereinigung: Branch-and-Bound Verfahren mit dualen Schranken: Theorie und Anwendung auf ein Quotientenproblem. Johannes Gutenberg-Universität Mainz.
  61. 16.12.1998: International Conference on Nonlinear Programming and Variational Inequalities: Local and Global Optimality Conditions for Minimizing Differences of Functions. City University of Hong Kong, China.
  62. 07.09.1998: 9th Belgian-French-German Conference on Optimization: Local and Global Optimality Conditions for Minimizing Differences of Functions. FUNDP Namur, Belgium.
  63. 26.08.1997: ISMP 1997: On Global Optimization of Sums of Ratios and the Corresponding Multiple-Objective Decision Problem. EPFL Lausanne, Switzerland.
  64. 03.04.1997: ADiMMO-Workshop: Lagrange-Dualität und Partitionsmethoden in der nichtkonvexen globalen Optimierung. FU Berlin.

Other talks

  1. 13.06.2017: On copositive programming, quadratic optimization and combinatorics of infinite graphs. Mathematisches Kolloquium, University of Wuppertal
  2. 08.01.2017: Zur Lösung von quadratischen und kombinatorischen Problemen mittels copositiver Optimierung. University of Augsburg
  3. 13.12.2016: Copositive programming: a framework for quadratic and combinatorial optimization, Magdeburg Lectures on Optimization and Control.
  4. 02.06.2016: Conic Optimization: Theory, Algorithms, and Applications in Economics and Business. Wirtschaftsuniversität Wien, Austria
  5. 31.05.2016: Copositive programming: a framework for quadratic and combinatorial optimization. Goethe-University Frankfurt.
  6. 26.11.2015: Lösen quadratischer Probleme mittels semidefiniter und copositiver Optimierung. Mathematisches Kolloquium, TU Ilmenau.
  7. 24.11.2015: Solving quadratic problems via semidefinite and copositive optimization.  Kolloquium Numerische und Angewandte Mathematik, University of Göttingen.
  8. 26.03.2015: Copositive Optimization. Budapest University of Technology and Economics, Hungary.
  9. 02.02.2015: Vom Nutzen konvexer Kegel in der mathematischen Optimierung. University of Paderborn, Germany.
  10. 11.02.2013: Copositive Optimierung. Humboldt Universität Berlin.
  11. 08.10.2012: Copositive optimization, the copositive cone, and its relation with Parrilo's approximations. Optimization and Applications Seminar, ETH Zürich.
  12. 04.05.2012: Copositive Programming. Laboratoire de Recherche en Informatique, Université de Paris Sud, France.
  13. 11.04.2011: Recent developments in copositive programming. University of Vienna, Austria.
  14. 14.10.2010: On the cones of completely positive and doubly nonnegative matrices and their use in optimization. University of Ljubljana, Slovenia.
  15. 16.06.2010: Copositive Optimierung. University of Trier, Germany.
  16. 19.03.2010: The Difference Between 5 x 5 Doubly Nonnegative and Completely Positive Matrices. DIAMANT Intercity seminar on number theory, University of Groningen.
  17. 27.01.2010: Vom Nutzen konvexer Kegel in der mathematischen Optimierung. Mathematisches Kolloquium, Universität Oldenburg, Germany.
  18. 18.01.2010: Lösen quadratischer und binärer Probleme mittels copositiver Optimierung. University of Göttingen, Germany.
  19. 15.12.2009: The Difference Between 5 x 5 Doubly Nonnegative and Completely Positive Matrices. Université Paul Sabatier, Toulouse, France.
  20. 26.11.2009: Lösen quadratischer und binärer Probleme mittels copositiver Optimierung. University of Ulm, Germany.
  21. 04.11.2009: On the cones of completely positive and doubly nonnegative matrices and their use in optimization. EIDMA Seminar, TU Eindhoven.
  22. 29.09.2009: Optimization over matrix cones, and how this helps to solve nonconvex optimization problems. University of Groningen.
  23. 23.06.2009: A Linear Approximation Approach for Copositive Programming. Université Paul Sabatier, Toulouse, France.
  24. 19.05.2009: Conic Optimization beyond Semidefinite Programming. Universiteit Twente.
  25. 13.11.2008: Conic Optimization beyond Semidefinite Programming. Universität Karlsruhe.
  26. 21.04.2008: Vom Nutzen konvexer Kegel in der diskreten Optimierung. TU Dortmund.
  27. 18.04.2008: Über diskrete und kontinuierliche Optimierung, und warum Kegeloptimierung dabei hilft. Universität St. Gallen, Switzerland.
  28. 01.04.2008: On Discrete and Continuous Optimization, and Why Conic Programming Is Helpful. Rijksuniversiteit Groningen, The Netherlands.
  29. 11.10.2007: Optimization over Convex Cones: Semidefinite Programming and Beyond. Operations Research Seminar, Universiteit van Tilburg, The Netherlands.
  30. 18.07.2007: Copositive Programming. Optimization and Applications Seminar, ETH Zürich, Switzerland.
  31. 04.05.2007: Neue Ansätze in der Kegeloptimierung. TU Kaiserslautern, Germany.
  32. 15.01.2007: Optimierung über konvexen Kegeln: Theorie und Anwendungen. Kolloquium des Fachbereichs Mathematik der RWTH Aachen, Germany.
  33. 18.12.2006: Continuous Approaches to Discrete Problems by means of Optimization over Convex Cones. Seminar für Optimierung, Universität Erlangen, Germany.
  34. 11.12.2006: Towards solving Copositive Programs. Vienna Continuous Optimization Colloquium 06, Austria.
  35. 30.11.2006: Continuous Approaches to Discrete Problems by means of Optimization over Convex Cones. Departement de Mathematiques, FUNDP Namur, Belgium.
  36. 29.11.2006: Kontinuierliche Ansätze zur diskreten Optimierung mittels konvexer Kegel. Optimierungskolloquium des Fachbereichs Mathematik der Universität Dortmund, Germany.
  37. 21.06.2006: Optimierung über konvexen Kegeln: Kontinuierliche Reformulierungen und Relaxierungen für diskrete Probleme. Kolloquium des Fachbereichs Mathematik und Naturwissenschaften der Bergischen Universität Wuppertal
  38. 15.12.2005: Kontinuierliche Lösungsstrategien für diskrete Probleme am Beispiel des Maximum Clique Problems. Kolloquium des Fachbereichs Mathematik und Informatik der Philipps-Universität Marburg, Germany.
  39. 15.11.2005: Studieren geht über Probieren: Graphen, Bäume und das Problem des Handlungsreisenden. Schnuppertag für Schülerinnen, Darmstadt University of Technology, Germany.
  40. 04.07.2005: Das Maximum-Clique Problem an der Schnittstelle zwischen diskreter und kontinuierlicher Optimierung. Seminar, Darmstadt University of Technology, Germany.
  41. 21.06.2004: Deterministische und stochastische Ansätze zur nichtlinearen Optimierung. Seminar, Fachhochschule Dornbirn, Austria.
  42. 03.05.2004: Dualität in der Optimierung: Vom konvexen zum nichtkonvexen Problem. Seminar, Universität Erlangen, Germany.
  43. 10.11.2003: Globale Optimierung: Deterministische und stochastische Ansätze. Seminar, Darmstadt University of Technology, Germany.
  44. 07.11.2003: A Stochastic Algorithm for Global Optimization. Seminar, Wirtschaftsuniversität Wien, Austria.
  45. 30.05.2003: Solving Fractional Programs with Stochastic Algorithms. Anderson Graduate School of Management, University of California at Riverside, USA.
  46. 15.04.2003: Using Nonconvex Duality for Global Optimization. Optimization Seminar, Department of Mathematics, University of Washington, Seattle, USA.
  47. 08.04.2003: The Branch-and-Bound Method for Global Optimization. Industrial Engineering Seminar, University of Washington, Seattle, USA.
  48. 04.04.2003: Nonconvex Duality: Theory and Applications. Management Sciences Seminar, Henry B. Tippie College of Business, University of Iowa, Iowa City, USA.
  49. 27.06.2002: Nichtkonvexe Dualität in Theorie und Praxis. TU Clausthal, Deutschland.
  50. 28.05.2002: Nichtkonvexe Dualität in Theorie und Praxis. TU Darmstadt, Deutschland.
  51. 22.04.2002: ISDS-Kolloquium: Nonconvex Duality: Theory and Applications. Universität Wien.
  52. 22.08.2000: MINERVA Optimization Center Summer School "Modern Optimization and its Applications in Engeneering": On Copositive Programming and Standard Quadratic Optimization Problems. Technion - Israel Institute of Technology, Haifa, Israel.
  53. 12.04.1999: Disputationsvortrag zur mündlichen Doktorprüfung: Duality in Global Optimization: Optimality Conditions and Algorithmical Aspects. Universität Trier.
  54. 28.04.1998: Seminar des Graduiertenkollegs "Mathematische Optimierung": Das Branch-and-Bound Verfahren in der globalen Optimierung: Theorie und Anwendung auf ein Quotientenproblem. Universtiät Trier, Deutschland.
  55. 31.03.1998: Ein Branch-and-Bound Verfahren zur Lösung des Summe-von-Quotienten Problems. Seminar der Abteilung Mathematische Methoden in der Statistik, WU Wien.
  56. 07.02.1998: Was ist Mathematische Optimierung? Tag der offenen Tür der Abteilungen Mathematik und Informatik, Universität Trier.
  57. 02.12.1997: Arbeitskreis "Optimierung" der österreichischen Gesellschaft für Operations Research: Lagrange-Duality and Partitioning Techniques in Nonconvex Global Optimization. TU Wien.
  58. 19.11.1997: Forschungsseminar des Graduiertenkollegs "Automatisierung des Entwurfs analoger und gemischt analog-digitaler Strukturen": Lagrange-Dualität und Partitionsmethoden in der nichtkonvexen globalen Optimierung. TU Ilmenau, Deutschland.
  59. 27.06.1997: Lagrange-Dualität und Partitionsmethoden in der nichtkonvexen globalen Optimierung. Vortrag anläßlich der Evaluierung des Graduiertenkollegs "Mathematische Optimierung" durch Gutachter der Deutschen Forschungsgemeinschaft, Universität Trier.
  60. 23.10.1996: Seminar des Graduiertenkollegs "Mathematische Optimierung": Notwendige und hinreichende Bedingungen für globale Optimalität. Universität Trier.
  61. 08.07.1996: Seminar des Graduiertenkollegs "Mathematische Optimierung": Nichtparametrische Regression. Universität Trier.
  62. 10.06.1996: ISOC-Kolloquium: Nichtparametrische Regression. Universität Wien.