Talks by Stefaan Vaes

2025

• 1 - 5 Dec Operator algebraic quantum groups, Banff International Research Station (BIRS), Banff, Canada.

• 6 - 10 Oct Spectral gaps, Isaac Newton Institute, Cambridge, United Kingdom.

• 25 - 29 Aug Orbit equivalence and topological and measurable dynamics, Centre International des Rencontres Mathématiques (CIRM), Marseille, France.

• 16 - 19 Jun Ergodic group actions and unitary representations, Polish Academy of Sciences, Bedlewo, Poland.

• 26 - 30 May Plenary lecture at the Canadian Operator Algebras Symposium (COSY), Waterloo, Canada.

• 18 Mar Colloquium of the Institut de Recherche Mathématique de Rennes, Rennes, France.

2024

• 23 - 27 Sep Group Operator Algebras: Classification, Structure and Rigidity. Banff International Research Station (BIRS), Banff, Canada.

• 17 - 20 Jun Noncommutativity in the North – MikaelFest, Chalmers University of Technology and University of Gothenburg, Gothenburg, Sweden.

• 22 - 26 Apr Group operator algebras and non commutative geometry, Centre International des Rencontres Mathématiques (CIRM), Marseille, France.

• 26 - 27 Feb Noncommutative Geometry, Analysis on Groups, and Mathematical Physics, Universiteit Gent.

2023

• 6 - 10 Nov Twinned Conference on C*-Algebras and Tensor Categories, International Centre for Mathematical Sciences, Edinburgh, United Kingdom.

• 9 - 13 Oct Totally disconnected locally compact groups: local to global, Münster, Germany.

• 21 - 25 Aug Conference on noncommutative harmonic analysis and rigidity theory in operator algebras, TU Delft, Delft, The Netherlands.

• 26 - 30 Jun Operator Algebras: Subfactors and Applications, Isaac Newton Institute, Cambridge, United Kingdom.

• 22 - 26 May Quantum groups and interactions, Glasgow, United Kingdom.

• 25 - 29 Mar Modern Trends in Operator Algebras, in memory of Ed Effros, UCLA, Los Angeles, United States.

2022

• 22 Sep Joint Mathematics Colloquium, ICMAT-UAM-UC3M-UCM, Madrid, Spain.

• 12 - 16 Sep Noncommutative harmonic analysis and quantum groups, Polish Academy of Sciences, Bedlewo, Poland.

• 29 Aug-2 Sep Von Neumann algebras, Hausdorff Research Institute for Mathematics, Bonn, Germany.

• 1 - 4 Jul Operator algebras, dynamics and groups, ICM satellite conference, Copenhagen, Denmark.

• 30 May-3 Jun Plenary lecture at the 50th Canadian Operator Algebra Symposium (COSy), Ottawa, Canada.

• 24 - 28 May Lecture series at the workshop Topological quantum groups, C*-tensor categories, and subfactors, University of Waterloo, Canada.

• 16 - 20 May Operator Algebras and Group Dynamics, Centre International des Rencontres Mathématiques (CIRM), Marseille, France.

• 31 Mar Mathematics Colloquium, University of Nevada at Reno, United States. (online)

• 11 Feb Distinguished Lecture of the Pacific Institute of Mathematical Sciences, University of Regina, Canada. (online)

2021

• 18 - 21 Oct Automorphisms and Invariants of Operator Algebras, Copenhagen University, Denmark.

• 13 - 17 Sep Quantum Groups: Algebra, Analysis and Category Theory, Oberwolfach, Germany.

• 23 - 27 Aug Noncommutative harmonic analysis and quantum groups, Będlewo, Poland. (postponed due to COVID-19 pandemic)

• 9 - 13 Aug Plenary lecture at the International Workshop on Operator Theory and its Applications (IWOTA), Orange, United States. (online)

• 20 - 21 Mar Brazos Analysis Seminar, Texas, United States. (online)

• 25 - 29 Jan Mini-course at the workshop Actions of Tensor Categories on C*-algebras, IPAM, UCLA, Los Angeles, United States. (online)

2020

• 13 - 18 Dec IPAM's Quantitative Linear Algebra Reunion Conference II, IPAM, Lake Arrowhead, San Bernardino County, United States. (postponed due to COVID-19 pandemic)

• 11 Dec Meeting of the Edinburgh Mathematical Society, Glasgow, United Kingdom. (online)

• 10 - 13 Dec Operator algebras, quantum information and beyond, UCLA, Los Angeles, United States. (postponed due to COVID-19 pandemic)

• 12 - 15 Oct Automorphisms and Invariants of Operator Algebras, Copenhagen University, Denmark. (postponed due to COVID-19 pandemic)

• 18 - 20 Aug Noncommutative Conference, Ghent Analysis and PDE Center, Gent, Belgium. (online)

• 27 - 31 Jul Mini-course at the concentration week Topological quantum groups, C*-tensor categories, and subfactors, Texas A&M University, College Station, United States. (postponed due to COVID-19 pandemic)

• 15 - 19 Jun Fifty years of Tomita-Takesaki theory, Tokyo University, Tokyo, Japan. (postponed due to COVID-19 pandemic)

• 21 Apr Polish Analysis Seminar, Institute of Mathematics of the Polish Academy of Science, Warsaw, Poland. (postponed due to COVID-19 pandemic)

• 30 Mar-3 Apr Deligne categories and quantum groups, RWTH Aachen University, Germany. (postponed due to COVID-19 pandemic)

• 21 - 22 Mar Workshop on II_1 factors, UCLA, Los Angeles, United States. (postponed due to COVID-19 pandemic)

2019

• 29 - 30 Nov Memorial conference Richard V. Kadison, Carlsberg Academy, Copenhagen, Denmark.

• Oct 31 Bourgain Day, Vrije Universiteit Brussel, Belgium.

• Sep 29-Oct 4 Classification problems in von Neumann algebras, Banff International Research Station, Banff, Canada.

• Sep 1 - 14 Chern lectures, Yau Mathematical Sciences Center, Tsinghua University, Beijing, China.

• Jun 20 - 22 Opening Colloquium Excellence cluster Mathematics, WWU Münster University, Münster, Germany.

• May 21 - 24 Conference Groupoids and Operator Algebras in honor of Jean Renault, Orléans University, Orléans, France.

• May 9 Lecture at the Leçons de Mathématiques et d'Informatique d'aujourd'hui, Bordeaux, France.

• Apr 29-May 3 Masterclass Subfactors and quantum groups, Department of Mathematics, University of Copenhagen, Denmark.

• Apr 8-12 Conference in honor of Étienne Blanchard, Institut de Mathématiques de Jussieu, Université Paris Diderot, Paris, France.

• Mar 11-15 Lecture series at Operator Algebras, Groups and Applications to Quantum Information, ICMAT, Madrid, Spain.

2018

• Dec 17-18 Symposium in honor of Alain Valette's 60th birthday, Neuchâtel, Switzerland.

• Nov 26-30 Workshop Model theory and operator algebras, Banff International Research Station, Banff, Canada.

• Jun 4-8 Plenary lecture SMF 2018: congrès de la Société Mathématique de France, Lille, France.

• Jun 4-8 Workshop L^2-invariants, ICMAT, Madrid, Spain.

• Apr 30-May 5 Workshop Approximation properties in operator algebras and ergodic theory, Institute of Pure and Applied Mathematics, UCLA, Los Angeles, United States.

• Apr 19 Institute of Mathematics Colloquium, EPFL, Lausanne, Switzerland.

• Mar 15 Colloquium, Institute of Mathematics of Jussieu, Paris, France.

• Mar 5-6 Tensor categories and analysis, Laboratoire de Mathématiques Nicolas Oresme, Caen, France.

2017

• Nov 30-Dec 1 Plenary lecture at Arbre de Noël, Orsay University, Orsay, France.

• Oct 13-14 Meeting in honor of Saad Baaj, University Clermont-Auvergne, Clermont-Ferrand, France.

• Oct 2 Colloquium School of Mathematical Sciences, Queen Mary University, London, United Kingdom.

• Sep 27-29 Plenary lecture at Joint meeting of the Edinburgh Mathematical Society and Societat Catalana de Matemàtiques, Edinburgh University, Edinburgh, United Kingdom.

• Sep 18-22 Two lectures at the workshop MASAs and Automorphisms of C*-Algebras, Oberwolfach, Germany.

• Aug 23-25 Opening lecture of the 43th Conference of the Belgian Society of French speaking Mathematics Teachers, Liège, Belgium.

• June 12 Rotschild Lecture, Isaac Newton Institute, Cambridge, United Kingdom.

• May 8-12 Approximation, deformation, quasification, Isaac Newton Institute, Cambridge, United Kingdom.

• Mar 29 - Apr 2 Noncommutative geometry: state of the art and future prospects, Fudan Institute for Advanced Study, Fudan University, Shanghai, China.

• Mar 31 Spring Operator Algebras Program, Research Center for Operator Algebras, East China National University, Shanghai, China.

• Jan 23-27 Structure of Operator Algebras: Subfactors and Fusion Categories, Isaac Newton Institute, Cambridge, United Kingdom.

• Jan 16-20 Lecture series at Primer on Subfactors and Applications, Isaac Newton Institute, Cambridge, United Kingdom.

2016

• Dec 13-17 Lecture series at Recent Advances in Operator Theory and Operator Algebras, Indian Statistical Institute, Bangalore, India.

• Dec 9 ULB Mathematics Colloquium, ULB, Brussels, Belgium.

• Oct 4-7 Riemann Conference, Münster University, Münster, Germany.

• Aug 8-12 Conference Operator Algebras and Mathematical Physics, Tohoku University, Sendai, Japan.

• Jul 18-22 7th European Congress of Mathematics, invited lecture, TU Berlin, Berlin, Germany.

• Jun 24-26 Symposium The mathematical legacy of Uffe Haagerup, University of Copenhagen, Denmark.

• May 17-25 Lecture series at the NCGOA Spring Institute 2016, Hausdorff Institute for Mathematics, Bonn, Germany.

• May 13 Young Mathematicians Colloquium, Lille, France.

• Apr 18-22 Workshop Von Neumann Algebras, Mittag-Leffler Institute, Stockholm, Sweden.

• Mar 22-23 Plenary lecture at the BeNeLux Mathematical Congress, UvA, Amsterdam, The Netherlands.

• Feb 22 Inaugural lecture Francqui Chair, VUB, Brussels, Belgium.

2015

• Nov 2-6 Noncommutative Geometry, Centre International des Rencontres Mathématiques, Marseille, France. Video recording.

• Aug 17-21 Lecture series at the YMC*A, Young Mathematicians in C*-Algebras, University of Copenhagen, Denmark.

• Aug 7-11 Abel Symposium, Hurtigruten Bergen-Harstad, Norway.

• Jun 22-23 Scottish Operator Algebra Seminar, Aberdeen, United Kingdom.

• Jun 1-3 Focus programme C*-algebras, Münster, Germany.

• May 1-17 NCGOA 13 Operator Algebras and Approximation Properties of Groups, Vanderbilt University, Nashville, USA.

• Mar 24-28 Workshop Subfactors and Conformal Field Theory, Oberwolfach, Germany.

• Mar 9-13 Workshop Kadison-Singer, Interlacing Polynomials, and Beyond, MSRI, Berkeley, USA.

2014

• Nov 27-29 Meeting of the GDR Noncommutative Geometry, Besançon, France.

• Oct 23 Colloquium Institute of Mathematics, UC Louvain, Louvain-la-Neuve, Belgium.

• Sep 22-26 Workshop Von Neumann Algebras and Ergodic Theory, UCLA, Los Angeles, USA.

• Aug 8-12 ICM Satellite Meeting Operator algebras and applications, plenary lecture, Cheong Pung, Jecheon, Korea.

• Jun 30-Jul 5 OT25: 25th International Conference in Operator Theory, Timisoara, Romania.

• Jun 2-6 Discrete groups and geometric structures, with applications, V, Leuven, Belgium.

• Apr 1-3 Belgian Bracket and Quantization Workshop, Brussels, Belgium.

2013

• Oct 31 General Mathematics Colloquium, Utrecht, The Netherlands.

• Oct 28-31 Nord Pas de Calais/Belgium congress of mathematics, Valenciennes-Mons, France-Belgium.

• Oct 24 Colloquium Mathematische Gesellschaft, Göttingen, Germany.

• Aug 26-30 Conference C*-algebras, Oberwolfach, Germany.

• Jul 8-12 Conference Mathematics and Quantum Physics, plenary lecture, Accademia dei Lincei, Rome, Italy.

• Jun 24-28 Summer School Rigidity and Group Actions, lecture series, Institut de Mathématiques de Jussieu, Paris, France.

• May 30-31 Conference Geometry and Analysis on groups , Neuchâtel, Switzerland.

• May 20-24 Research program Operator Algebras and Harmonic Analysis, lecture series, ICMAT, Madrid, Spain.

• Mar 7 Mathematics Colloquium, University of California at San Diego, UCSD, United States.

• Jan 18 Colloquium Department of Mathematics, Saarland University, Saarbrücken, Germany.

2012

• Dec 19-22 Winter School Banach Spaces and Operator Algebras, lecture series, Cheong Pung Resort, Jecheon, Korea.

• Sep 24-28 Kick-off conference Centre Européen pour les Mathématiques, la Physique et leurs Interactions, plenary lecture, University of Lille, Lille, France.

• Jun 18 - 22 Descriptive set theory and functional analysis, BIRS, Banff, Canada.

• June 6-8 Joint Conference of the Belgian, Royal Spanish and Luxembourg Mathematical Societies, plenary lecture, University of Liège, Liège, Belgium.

• May 30-Jun 3 GPOTS 2012, plenary lecture, University of Houston, Houston, United States.

• Mar 21 - 22 Operator algebras, Quantum groups and Tensor categories, in honor of L. Vainerman, Caen, France.

• Jan 9 - 13 Conference on von Neumann Algebras and Related Topics, RIMS, Kyoto University, Japan.

2011

• Dec 7 - 16 Winter School on Operator Algebras, RIMS, Kyoto University, Japan. Lecture series.

• Sep 21 - 23 Workshop for young researchers in mathematics 2011, Universidad Complutense de Madrid, Madrid, Spain.

• Sep 19 - 23 Operator algebras and quantum groups, Stefan Banach Center for Mathematics, Warsaw, Poland.

• May 31 Colloquium, University of Metz, France.

• May 2 - 20 Von Neumann algebras and ergodic theory of group actions, IHP, Paris, France.

• Apr 25 - 30 Annual Meeting EU-NCG, IMAR, Bucharest, Romania.

2010

• Oct 9 - 10 AMS Western Section Meeting, UCLA, Los Angeles, United States.

• Aug 19 - 27 International Congress of Mathematicians, invited lecture in the section Functional Analysis and Applications, Hyderabad, India.

• May 10 - 19 Eighth annual spring institute on noncommutative geometry and operator algebras, Vanderbilt University, Nashville, United States.

• Mar 7 - 13 Conference C*-Algebras, Oberwolfach, Germany.

• Feb 1 - 5 Workshop on von Neumann algebras and group actions, University of Copenhagen, Denmark.

2009

• Dec 8 - 11 Operators and Operator Algebras in honour of A. Gillespie and A. Sinclair, The University of Edinburgh, United Kingdom.

• Dec 7 - 11 Operator algebras, groups and geometry, CIRM, Marseille, France.

• Sep 28-Oct 2 Annual meeting of EU-network Noncommutative Geometry, University of Copenhagen, Denmark.

• Sep 16 - 18 Lecture series at the School on Operator Algebras, Institute of Mathematics of the Romanian Academy, Bucharest, Romania.

• Jul 14 - 24 Banach Algebras 2009, Stefan Banach International Mathematical Center, Będlewo, Poland.

• May 14 - 16 Workshop Quantum Groups, Université Paul Sabatier, Toulouse, France.

• Mar 15 - 18 Workshop Von Neumann algebras and ergodic theory, UCLA, Los Angeles, United States.

• Mar 4 Mathematics Colloquium, Radboud University, Nijmegen, The Netherlands.

• Feb 12 Colloquium de Mathématiques Pures et Appliquées, Université Catholique de Louvain, Louvain-la-Neuve, Belgium.

• Feb 5 Mathematics Colloquium, University of Münster, Germany.

2008

• Dec 4 - 6 Journées groupes et algèbres d'opérateurs, Université de Caen, France.

• Oct 26-Nov 1 Von Neumann algebras and ergodic theory of group actions, Mathematisches Forschungsinstitut Oberwolfach, Germany.

• Aug 17 - 23 C*-algebras, Mathematisches Forschungsinstitut Oberwolfach, Germany.

• Jun 27 - 28 Operator Algebra Days, at the occasion of the retirement of Claire Anantharaman-Delaroche, Bourges, France.

• Jun 13 Meeting of the Tripode, Lyon, France.

• Mar 23 - 28 Topics in von Neumann algebras, Banff, Canada.

2007

• Dec 11 - 15 Fields Institute Workshop Operator Spaces and Quantum Groups, Toronto, Canada.

• Nov 23 - 25 Inaugural meeting of the GDRE Non Commutative Geometry, Rome, Italy.

• Nov 2 - 3 North British Functional Analysis Seminar, Leeds, United Kingdom.

• Oct 29-Nov 2 Fields Institute Workshop Von Neumann Algebras, Toronto, Canada.

• Aug 13 - 24 Summer School Operator Algebras, Ottawa, Canada.

• Jun 18 - 22 Meeting of the GDR Noncommutative Geometry, Fleurance, France.

• Mar 29-Apr 6 Non Commutative Geometry, Conference in honor of Alain Connes, IHP, Paris, France.

• Mar 17 - 19 Workshop Von Neumann algebras and ergodic theory, UCLA, Los Angeles, United-States.

• Feb 26-Mar 2 Conference Groupoids in operator algebras and noncommutative geometry, IHP, Paris, France.

2006

• Nov 15 - 18 MSJ-IHES Joint Workshop on Noncommutativity, IHES, Bures-sur-Yvette, France.

• Nov 8 - 11 Workshop Recent advances in operator algebras, Rome, Italy.

• Sep 21 - 28 Research group Noncommutative Geometry and Operator Algebras, Vanderbilt University, United States. Title: Deformation and rigidity results for crossed product II_1 factors.

• Sep 16 - 21 Topics in von Neumann algebras, Banff, Canada.

• Jun 6 - 9 Symposion of the Sonderforschungsbereich Geometrische Stukturen in der Mathematik, Münster, Germany.

• May 27 - 30 Beyond Amenability: Groups, Actions and Operator Algebras, UCLA, Los Angeles, United States.

• Mar 19 Bourbaki Seminar, Rigidity results for Bernoulli shifts and their von Neumann algebras (after Sorin Popa), Institut Henri Poincaré, Paris, France.

2005

• Lecture series at the PhD School of the Center in Non-Commutative Geometry, Copenhagen, Denmark.

• C*-Algebren, Oberwolfach, Germany.

• Operator Algebras and Mathematical Physics, Bucharest, Romania.

• Fields Institute Summer School Operator Algebras, Ottawa, Canada.

• Joint meeting Benelux - France, Gent, Belgium.

• Cours Peccot in the Collège de France, Paris.

2004

• Colloquium, Institute of Mathematics, University of Neuchâtel, Switzerland.

• Non-commutative geometry, Oberwolfach, Germany.

• Fields Institute Workshop on Kazhdan's Property (T), Ottawa, Canada.

• K-theory and non-commutative geometry, Institut Henri Poincaré, Paris, France.

• Bourbaki Seminar, Free quasi-free states and factors of type III (after D. Shlyakhtenko), Institut Henri Poincaré, Paris, France.

• Locally compact quantum groups and quantum symmetries, CIRM, Marseille, France.

• Non-commutative geometry 2004 von Neumann algebras, CIRM, Marseille, France.

2003

• C*-Algebren, Mathematisches Forschungsinstitut Oberwolfach, Germany.

• International Conference "Groups", Paris, France.

2002

• Frontier of Non Commutative Analysis and Mathematical Quantum Theory, Kyushu University, Fukuoka, Japan.

• 9th Leuven Mathematical Physics Days, K.U.Leuven, Belgium.

• Nichtkommutative Geometrie, Mathematisches Forschungsinstitut Oberwolfach, Germany.

• 69th Rencontre entre Physiciens et Mathématiciens, Strasbourg, France.

2001

• School/Conference on noncommutative geometry and quantum groups, Warsaw, Poland.

• Colloquium Pure Mathematics, Department of Mathematics, Queen's University Belfast, United Kingdom.

• Workshop on quantum groups and special functions, T.U.Delft, The Netherlands.

2000

• XIIIth International Conference on Mathematical Physics, London, United Kingdom.

• Workshop Mathematical and Physical Aspects of Quantum groups organized by the Max-Planck Institutes of Munich and Leipzig in Bayrischzell, Germany.

1999