Combinatorics of Lie Type, a Conference in Honor of Loius Solomon, University of Wisconsin-Madison, June 16-22, 2000
Midwest Conference on Lie Algebras and Related Topics, University of Wisconsin-Milwaukee, May 5-6, 2001
Symmetric Functions 2001: Surveys of Developments and Perspectives, Newton Institute, Cambridge, UK, June 25-July 6, 2001
Representation Theory of Algebraic groups and Quantum Groups, Sophia University, Tokyo, August 1-10, 2001
Aspects of Symmetry, Banff, August 26-29, 2001
Joint British Mathematical and Applied Mathematical Colloquium, Mathematics Institute - University of Warwick, April 7-12, 2002
Enveloping Algebras and Algebraic Lie Representations, Mathematisches Forschungsinstitut Oberwolfach, Germany, April 28 - May 4, 2002
Workshop on Computational Lie Theory, Centre de recherches mathématiques, Université de Montréal, Canada, May 27 - June 7, 2002
Current trends in Commutative Algebra, Levico-Terme, Italy, June 17-21, 2002
Geometric Aspects of Representation Theory, University of Sydney, Australia, July 21-26, 2002
Commutative Algebra and Geometry, Banff International Research Station, Canada, March 29 - April 3, 2003
Special Session on Combinatorial Commutative Algebra and Algebraic Geometry, AMS Meeting #987, San Francisco, CA, May 3-4, 2003
Géométrie et théorie des représentations, Université de Genève, Switzerland, June 9 - 20, 2003
Integer points in polyhedra. Geometry, Number Theory, Algebra, Optimization, Snowbird, Utah, July 12-18, 2003
CDM 2003: Current Developments in Mathematics, Harvard University, Cambridge, November 21-22, 2003
Algebraic Groups, Mathematisches Forschungsinstitut Oberwolfach, Germany, February 29 - March 6, 2004
Geometric Methods in Algebra and Representation Theory, University of Warwick, UK, March 29 - April 3, 2004
Representation theory, dynamical systems, and asymptotic combinatorics, St Petersburg, Russia, June 8-13, 2004
2004 International Math conference, Chonbuk National University, Chonju, Korea, August 4-6, 2004
XI International Conference on Representations of Algebras and Workshop, Queretaro and Patzcuaro, Mexico, August 11-20, 2004
Braid Groups, Clusters and Free Probability, American Institute of Mathematics, Palo Alto, California, January 10-14, 2005
Perspectives in Mathematics: Algebras and Representations. Conference dedicated to the 60th birthday of Claus Michael Ringel, Bielefeld, Germany, February 4-5, 2005
Representation Theory of Finite-Dimensional Algebras, Mathematisches Forschungsinstitut Oberwolfach, Germany, February 6 - 12, 2005
Enveloping Algebras and Geometric Representation Theory, Mathematisches Forschungsinstitut Oberwolfach, Germany, March 13 - 19, 2005
DEA course "Cluster algebras" CIRM, Luminy, France, May 9-13, 2005.
Representation theory, geometry and automorphic forms. Conference dedicated to the 60th birthday of Joseph Bernstein, Tel Aviv, Israel, June 5-9, 2005.
Special session on Algebraic and Geometric Combinatorics, AMS Meeting #1009, Annandale-on-Hudson, NY, October 8-9, 2005.
London Mathematical Society Regional Meeting and Workshop on Teichmüller Theory and Cluster Algebras, University of Leicester, UK, May 15-18, 2006.
Workshop on Cluster Algebras and Cluster Tilted Algebras, University of Bielefeld, Germany, May 25-27, 2006.
Geometry and Representation Theory Conference in honor of the 60th birthday of George Lusztig, Massachusetts Institute of Technology, May 30-June 3, 2006.
NSF/CBMS conference on Cluster Algebras and Applications, North Carolina State University, Raleigh, June 13-17, 2006.
Symmetries and Integrability of Difference Equations (SIDE) VII, Melbourne, Australia, July 10-14, 2006.
North American Workshop on Tropical Geometry, BIRS, Banff, Canada, March 4-9, 2007.
Frontiers in Mathematics lecture series, Texas A&M University, March 19-23, 2007.
Mutations for Quivers and Their Representations, GRASP lecture series, University of Texas at Austin, March 23, 2007.
Algebraic Groups, Mathematisches Forschungsinstitut Oberwolfach, Germany, April 22-28, 2007.
Representations, Cohomology and Support Spaces, University of Bielefeld, Germany, April 29-May 1, 2007.
Perspectives in Auslander-Reiten Theory. On the occasion of the 65th birthday of Idun Reiten, Trondheim, Norway, May 10-12, 2007.
Workshop on Algebraic and Geometric Representation Theory, University of Aarhus, Denmark, June 25-30, 2007.
XII International Conference on Representations of Algebras and Workshop, Torun, Poland, August 15-24, 2007.
LieGrits Workshop, Mathematical Institute, University of Oxford, January 3-8, 2008.
Topics in Combinatorial Representation Theory, MSRI, Berkeley, March 17-21, 2008. Video of my talk there.
The 12th Midrasha Mathematicae: Higher Teichmüller theory, clusters, and quantization, Einstein Institute of Mathematics, Hebrew University of Jerusalem, May 11-19, 2008.
Antalya Algebra Days X, Antalya, Turkey, May 28 - June 1, 2008.
Colloquium of Non Commutative Algebra, Université de Sherbrooke, Canada, June 9-14, 2008.
International Conference and Workshop on Cluster Algebras and Related Topics, Workshop: Morelia, Mexico, December 8-13, 2008; Conference: Mexico City, Mexico, December 15-20, 2008.
The Abel Symposium 2009, Combinatorial aspects of commutative algebra and algebraic geometry, Voss, Norway, June 1–4, 2009.