- UPenn,
*Math-Physics Joint Seminar*, October. - Clay Math Institute,
*Workshop on Modern Moduli Theory*, September. - University of Oxford,
*Modern Moduli Theory*Graduate School, September. - UIUC,
*Enumerative Geometry, Mirror Symmetry, and Physics*, July. - University of Texas-Austin,
*GADGET Seminar*, April. - United States Military Academy (West Point),
*Colloquium*, April. - Columbia University,
*Algebraic Geometry Seminar*, April. - UIC,
*Geometry, Topology, and Dynamics Seminar*, January.

- Minneapolis,
*AMS Sectional Meeting*(invited address), October. - Chapel Hill,
*Workshop on Symplectic Varieties and Geometric Representation Theory*, October. - Ann Arbor,
*Advances in Geometric Representation Theory*, May. - Perimeter Institute,
*Symplectic Duality and Gauge Theory*, April. - Evanston,
*Representation Theory, Integrable Systems and Quantum Field Theory*, April. - Simons Center for Geometry and Physics,
*Geometric Representation Theory*, January.

- University of Oxford,
*Derived Structures in Geometry and Representation Theory*, September. - Salt Lake City,
*AMS Summer Institute in Algebraic Geometry*, July. - Banff,
*Geometric Unification from Six-Dimensional Physics*, May. - Boston,
*Geometry and Representation Theory of Symplectic Resolutions*, May. - UIC, Algebraic Geometry Seminar, April.

- Stony Brook,
*Colloquium*, October. - RIMS, Kyoto,
*Geometric Representation Theory*, July/August. - University of Oxford,
*Algebraic and Symplectic Geometry Seminar*, May. - Oberwolfach,
*Interactions between Algebraic Geometry and Noncommutative Algebra*, May. - University of Toronto,
*Geometric Representation Theory Seminar*, April. - University of Utah,
*Representation Theory Seminar*, February.

- Aspen Center for Physics,
*Mathematics of Superconformal Field Theory*, July. - University of Oxford,
*Algebraic and Symplectic Geometry Seminar*and*Representation Theory Seminar*, May. - University of Notre Dame,
*SUMR Reunion Conference*, March.

- Northwestern University,
*Colloquium*, December. - University of Wisconsin,
*Algebraic Geometry Seminar*, November. - University of Michigan,
*Algebraic Geometry Seminar*, November. - CIRM, Luminy,
*Representation Theory and Symplectic Algebraic Geometry*, July. - Northwestern University,
*Spring School on Algebraic Microlocal Analysis*, May. - AMS Session on
*Geometric Representation Theory*, University of Kansas, March/April. - University of Texas,
*GADGET Seminar*, February.

- University of Manchester,
*ARTIN meeting*, December. -
Kavli Royal Society Centre and University of Oxford,
*Workshop on Symplectic Resolutions, Quantum Cohomology, and Symplectic Reflection Algebras*, July. - Isle of Skye,
*New Developments in Noncommutative Algebra and its Applications,*June. - Notre Dame,
*Mathematical Aspects of Quantization Conference,*June. - University of Pennsylvania,
*Math/Physics Seminar*, April. - Northwestern University,
*Geometry and Physics Seminar*, April. - Purdue University,
*Algebraic Geometry Seminar*, February.

- UIC, Algebraic Geometry Seminar, November.
- Oberwolfach,
*Interactions between Algebraic Geometry and Noncommutative Algebra*, May.

- University of Maryland,
*Algebra and Number Theory Seminar*, December. - Chicago,
*Algebraic Geometry: a Conference in Honor of Anatoly Libgober's 60th Birthday*, October. - University of Notre Dame,
*Colloquium*, October.

- Cinvestav, Mexico City,
*NAS-Cinvestav Lectures*, December. - University of Manchester,
*Geometry Seminar*, May. - Imperial College,
*London Topology and Geometry Seminar*, May. - Oxford University,
*Algebraic and Symplectic Geometry Seminar*, May. - University of Edinburgh,
*Algebra Seminar*, May. - AMS Session on
*D-modules*, Indiana University, April.

- CRM Montreal,
*Workshop on nonlinear integral transforms*, August. - University of Michigan,
*Workshop on F-singularities and D-modules*, August. - AIM,
*Arithmetic harmonic analysis on character and quiver varieties*, June. - Northwestern University,
*Trends in Noncommutative Geometry*, May. - Ohio State University,
*Algebraic Geometry Seminar*, May. - University of Michigan,
*Workshop on D-bundles and integrable hierarchies*, May. - University of Wisconsin-Madison,
*Algebraic Geometry Seminar*, April. - University of Texas-Austin,
*Geometry Seminar*, March. - Workshop on
*Langlands Duality and Physics*, Erwin Schrodinger Institute, Vienna, January.

- AMS Session on
*Birational Geometry*, University of Cincinatti, October, 2006. - Boston University,
*Geometry Seminar*, October, 2006. - Ohio State University,
*Algebraic Geometry Seminar*, May, 2006. - Recent Trends in Higher-Dimensional Geometry, Banff, April 2006.

- Western Algebraic Geometry Seminar, Salt Lake City, December 2005.
- Cornell University,
*Colloquium*, November 2005. - Cornell University,
*Lie Groups Seminar*, November 2005. - Northwestern University,
*Geometry/Physics Seminar*, November 2005. - Northern Illinois University,
*Colloquium*, November 2005. - AMS Session on
*Noncommutative Algebra and Geometry*, Santa Barbara, April 2005.

- Columbia University,
*Algebraic Geometry Seminar*, April 2004.

- Princeton University,
*Geometry, Representation Theory and Moduli Seminar*, March 2004. - University of Oregon,
*Colloquium*, February 2004. - Michigan State University,
*Colloquium*, January 2004. - University of Kansas,
*Colloquium*, January 2004. - University of Kansas,
*Algebra Seminar*, January 2004. - University of Illinois at Urbana-Champaign,
*Colloquium*, January 2004. - University of Notre Dame,
*Colloquium*, January 2004. - University of Notre Dame,
*Algebra Seminar*, January 2004. - University of Utah,
*Colloquium*, January 2004. - University of Utah,
*Algebraic Geometry Seminar*, January 2004. - Ohio State University,
*Algebraic Geometry Seminar*, January 2004.

- SUNY Buffalo,
*Colloquium*, December 2003. - Kansas State University,
*Colloquium*, December 2003. - University of Massachusetts-Amherst,
*Colloquium*, December 2003. - Johns Hopkins University,
*Algebraic and Complex Geometry Seminar*, December 2003. - Ohio State University/University of Michigan
*Algebraic Geometry Workshop*, November 2003. - Cornell University,
*Lie Groups Seminar*, November 2003. - Cornell University,
*Colloquium*, November 2003. - CRM, Montreal,
*Mathematical Physics Seminar*, November 2003. - University of Illinois at Urbana-Champaign,
*Algebraic Geometry Seminar*, September 2003. - Michigan State University,
*Symplectic Geometry Seminar*, April 2003. - AMS Session on
*Algebraic Geometry and Integrable Systems*, NYU, April 2003.

- Rice University,
*Algebraic Geometry Seminar*, November 2002. - University of Pennsylvania,
*Algebra Seminar*, September 2002. - MSRI,
*Workshop on Non-Abelian Hodge Theory*, April 2002. - University of California-Berkeley/Stanford University,
*Joint ``Compactifications'' Seminar*, March 2002.

- University of Wisconsin-Madison,
*Topology/Geometry Seminar*, February 2001. - University of Illinois at Urbana-Champaign,
*Differential Geometry seminar*, October 2000. - University of Notre Dame,
*PDE, Complex Analysis, and Differential Geometry Seminar*, May 2000. - University of Pennsylvania,
*Math/Physics Seminar*, April 2000.

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