David Nadler
Curriculum Vitae


Department of Mathematics
University of California, Berkeley
815 Evans Hall
Berkeley, CA 94720-3840

Phone: +1 (510) 642-6550
Fax: +1 (510) 642-8204

email: nadler@math.berkeley.edu

Education

Ph.D. Princeton University, 2001
Thesis title: Perverse sheaves on real loop Grassmannians
Thesis adviser: Robert MacPherson, Institute for Advanced Study

B.S. Brown University, 1996
Budapest Semesters in Mathematics, Hungary, Fall 1994-Spring 1995.

Employment

2012-current Professor, Department of Mathematics, University of California, Berkeley
2011-2012 Professor, Department of Mathematics, Northwestern University
2008-2011 Associate Professor, Department of Mathematics, Northwestern University
Spring 2008 Member, School of Mathematics, Institute for Advanced Study
2005-2008 Assistant Professor, Department of Mathematics, Northwestern University
2001-2005 L.E. Dickson Instructor, Department of Mathematics, University of Chicago

Honors

Spring 2017 William J. Spencer Lecture, Kansas State University
2016-2017 Miller Research Professor, Miller Institute, University of California, Berkeley
Fall 2012 Cahit Arf Lecture, Middle East Technical University, Ankara, Turkey
Fall 2012 Andreas Floer Memorial Lecture, Stanford University
Fall 2012 Elected AMS Fellow
Winter 2011 Invited address, Current Events Bulletin, Joint Mathematics Meetings, New Orleans
2009 Clarence Ver Steeg Graduate Faculty Award, Northwestern University
Fall 2008 Invited address, AMS Central Section Meeting, Western Michigan University
2007-2009 Alfred P. Sloan Research Fellowship, Northwestern University
2002-2005 NSF Postdoctoral Research Fellowship, University of Chicago
1997-2000 NSF Graduate Research Fellowship, Princeton University
1996 David Howell Premium for Excellence in Mathematics, Brown University
1996 Phi Beta Kappa, Brown University

Research support

2015-current Principal investigator, Microlocal geometry in gauge theory, NSF DMS grant #1502178
2012-2015 Principal investigator, Quantum topological structures in geometric representation theory, NSF DMS grant #1201319/#1319287
2012-current Co-principal investigator, FRG: Collaborative Research: In and Around Theory X, NSF DMS grant #1160227
2009-2012 Principal investigator, Representation theory via topological field theory, NSF DMS grant #0901114
2008-current Co-principal investigator, SQuaRE grant, American Institute of Mathematics
2007-2012 Member, Research Training Group in Geometry and Physics, NSF DMS grant #0636646, principal investigators: E. Getzler, B. Tsygan, E. Zaslow
2006-2009 Principal investigator, Perverse sheaves in representation theory, NSF DMS grant #0600909

Papers and preprints

  1. arXiv:1702.03255, with Benjamin Gammage, Mirror symmetry for honeycombs, preprint 2017.
  2. arXiv:1611.04078, with Zhiwei Yun, Spectral action in Betti Geometric Langlands, preprint 2016.
  3. arXiv:1610.08398, with Zhiwei Yun, Geometric Langlands correspondence for SL(2), PGL(2) over the pair of pants, preprint 2016.
  4. arXiv:1606.08523, with David Ben-Zvi, Betti Geometric Langlands, preprint 2016.
  5. arXiv:1604.00114, Wrapped microlocal sheaves on pairs of pants, preprint 2016.
  6. arXiv:1602.07379, with David Ben-Zvi, Betti spectral gluing, preprint 2016.
  7. arXiv:1601.02977, Mirror symmetry for the Landau-Ginzburg A-model M=C^n, W=z_1 ... z_n, preprint 2016.
  8. arXiv:1510.08762, with Penghui Li, Uniformization of semistable bundles on elliptic curves, preprint 2015.
  9. arXiv:1507.08735, A combinatorial calculation of the Landau-Ginzburg model M=C^3, W=z_1 z_2 z_3, to appear in Selecta Math.
  10. arXiv:1507.01513, Non-characteristic expansions of Legendrian singularities, preprint 2015.
  11. arXiv:1312.7164, with David Ben-Zvi and Anatoly Preygel, Integral transforms for coherent sheaves, to appear in J. Eur. Math. Soc.
  12. arXiv:1312.7163, with David Ben-Zvi and Anatoly Preygel, A spectral incarnation of affine character sheaves, to appear in Compositio Math.
  13. arXiv:1309.4122, Arboreal singularities, to appear in Geometry & Topology.
  14. arXiv:1306.0070, Cyclic symmetries of A_n-quiver representations, Advances in Math. 269 (2015), 346--363.
  15. arXiv:1305.7177, with David Ben-Zvi, Secondary traces, preprint, 2013.
  16. arXiv:1305.7175, with David Ben-Zvi, Nonlinear traces, preprint, 2013.
  17. arXiv:1302.7053, with David Ben-Zvi, Elliptic Springer Theory, Compositio Math. 151 (2015) no. 8, 1568--1584.
  18. arXiv:1209.0193, with David Ben-Zvi and John Francis, Morita equivalence for convolution categories: Appendix to arXiv:0805.0157, preprint, 2012.
  19. arXiv:1209.0188, with David Ben-Zvi, Beilinson-Bernstein localization over the Harish Chandra center, preprint, 2012.
  20. arXiv:1109.4848, Fukaya categories as categorical Morse homology, SIGMA 10 (2014), 018, 47 pages.
  21. arXiv:1109.4835, with Hiro Lee Tanaka, A stable oo-category of Lagrangian cobordisms, preprint, 2011.
  22. arXiv:1009.1862, The Geometric Nature of the Fundamental Lemma, Bull. Amer. Math. Soc. 49 (2012), 1--50.
  23. arXiv:1004.5120, with David Ben-Zvi, Loop Spaces and Representations, Duke Math. J. 162 (2013), no. 9, 1587--1619.
  24. arXiv:1002.3636, with David Ben-Zvi, Loop Spaces and Connections, J. Topology (2012) 5(2): 377--430.
  25. arXiv:0904.1247, with David Ben-Zvi, The Character Theory of a Complex Group, preprint, 2009.
  26. arXiv:0806.4566, Springer theory via the Hitchin fibration, Compositio Math. 147 (2011), no. 5, 1635--1670.
  27. arXiv:0805.0157, with David Ben-Zvi and John Francis, Integral Transforms and Drinfeld Centers in Derived Algebraic Geometry, J. Amer. Math. Soc. 23 (2010), 909--966.
  28. arXiv:0706.0322, with David Ben-Zvi, Loop Spaces and Langlands Parameters, preprint, 2007.
  29. arXiv:math/0612399, Microlocal branes are constructible sheaves, Selecta Math. 15 (2009), no. 4, 563--619.
  30. arXiv:math/0611323, with Dennis Gaitsgory, Spherical varieties and Langlands duality, Moscow Math. J. 10 (2010), no. 1, (Special Issue: In honor of Pierre Deligne), 65--137.
  31. arXiv:math/0604428, Morse theory and tilting sheaves, Pure App. Math. Q. 2 (2006), no. 3, (Special Issue: In honor of Robert MacPherson, Part 1 of 3), 83--108.
  32. arXiv:math/0604379, with Eric Zaslow, Constructible Sheaves and the Fukaya Category, J. Amer. Math. Soc. 22 (2009), 233--286.
  33. arXiv:math/0411266, with Dennis Gaitsgory, Hecke operators on quasimaps into horospherical varieties, Documenta Math. 14 (2009) 19--46.
  34. arXiv:math/0311339, with Matthew Emerton and Kari Vilonen, A geometric Jacquet functor, Duke Math. J. 125 (2004), no. 2, 267--278.
  35. arXiv:math/0301091, Matsuki correspondence for the affine Grassmannian, Duke Math. J. 124 (2004), no. 3, 421--457.
  36. arXiv:math/0202150, Perverse Sheaves on Real Loop Grassmannians, Invent. Math. 159 (2005), no. 1, 1--73.
  37. Oscillation and boundary curvature of holomorphic curves in C^n, with Sergei Yakovenko, Math. Res. Lett. 5 (1998), 137--148.
  38. Minimal 2-fold coverings of E^d, Geom. Dedicata 65 (1997), 305--312.

Ph.D. students supervised

University of California, Berkeley:
Current Shishir Agrawal
Current Daniel Appel
Current Harrison Chen
Current Benjamin Gammage
2016 Penghui Li, Uniformization of semistable bundles on elliptic curves
Current James McIvor
Current Ben Wormleighton
Current Kevin Wray (joint with N. Reshetikhin)
Current Qiaochou Yuan
Current Qiao Zhou
Current Alex Zorn
2015 Xin Jin, Symplectic approaches in geometric representation theory

Northwestern University:
2016 Chris Elliott, Gauge theoretic aspects of the geometric Langlands correspondence
2015 Clemens Koppensteiner, Some microlocal aspects of perverse coherent sheaves and equivariant D-modules
2013 Sam Gunningham, Categorified harmonic analysis on complex reductive groups
2013 Ian Le, Higher laminations and affine buildings
2012 Ted Stadnik, Constructions using differential operators in positive characteristic
2012 Mike Skirvin, A global analogue of the Springer resolution for SL_2
2010 Thomas Dunlap, Combinatorial representation theory of affine SL_2 via polytope calculus


Postdoctoral researchers sponsored

2009-2012 John Francis, Northwestern University, NSF Postdoctoral Research Fellowship recipient

Undergraduate research mentored

University of California, Berkeley:
current Weiyi Liu, Honors thesis
Summer 2014 Brian Gluzman, Algebraic Geometry
Spring 2014 Weiqiao Han, Honors thesis: An Elementary Introduction to the Riemann Zeta Function and some of its Applications
Summer 2013 Jize Yu, Representation theory
Summer 2013 Yusuf Baris Kartal, Loop groups

Northwestern University honors theses:
2012 Frederick Robinson, Persistent homology
2010 Andrea Heyman, Lefschetz fixed point theorem
2009 Adam Vollrath, Elliptic curves
2008 Jonah Leshin, Tate's thesis

Northwestern University Summer Research Grant recipients:
Summer 2007 Jonah Leshin, Analytic Number Theory
Summer 2006 Durga Borkar, Hecke Algebras


Mentor at graduate workshops

  1. Fukaya Categories via Microlocal Sheaf Theory, MIT-RTG Geometry Workshop, Keystone, Colorado, June 2011.
  2. The Fundamental Lemma, Workshop organized by J. Kamnitzer and C. Mautner, Duntroon, Ontario, August 2010.

Courses taught

University of California, Berkeley:
Spring 2017 Math 274, Langlands duality
Fall 2016 Graduate seminar, Geometric Representation Theory: Lagrangian singularities
Fall 2015 Math 54, Linear Algebra and Differential Equations
Spring 2014 Math 256A, Algebraic Geometry
Fall 2015 Graduate seminar, Geometric Representation Theory: singular hypersurfaces
Spring 2015 Graduate seminar, Geometric Representation Theory: key tools
Fall 2014 Math 54, Linear Algebra and Differential Equations
Spring 2014 Math 215B, Algebraic Topology
Spring 2014 Graduate seminar, Geometric Representation Theory: What is...?
Fall 2013 Math 110, Linear Algebra
Fall 2013 Math 274, Microlocal geometry
Fall 2013 Graduate seminar, Geometric Representation Theory: student research
Spring 2013 Math 256B, Algebraic Geometry
Spring 2013 Graduate seminar, Geometric Representation Theory: Positive Grassmannians
Fall 2012 Math 110, Linear Algebra
Fall 2012 Graduate seminar, Geometric Representation Theory: D-modules

Northwestern University:
Winter 2012 Math 448, Geometry and Topology
Fall 2011 Math 440, Geometry/Topology
Fall 2011 Math 483, Algebraic Geometry
Spring 2011 Math 340, Geometry
Fall 2010, Winter 2011 Math 448, Geometry and Topology
Winter, Spring 2010 Math 448, Geometry and Topology
Winter 2010 Math 396, Undergraduate seminar: Singularities
2008-2009 Math 448, Geometry and Topology
Fall 2007 Math 484, Lie theory
Fall 2006 Math 478, Equivariant Geometry
Fall 2006 Math 230, Multivariable Calculus
Winter 2006 Math 478, Hecke Algebras
Fall 2005 Math 484, Representation Theory
Fall 2005 Math 230, Multivariable Calculus

University of Chicago:
Winter 2004 Analysis in R^n
2001-2002 Honors Calculus

Princeton University:
Fall 2012 Calculus
Fall 1999 Calculus

Invited talks

  1. Higher ribbon graphs, William J. Spencer Lecture, Kansas State, March 2017.
  2. Higher ribbon graphs, Mathematics Department colloquium, UCLA, February 2017.
  3. Symmetry and Singularities, Miller Institute, Berkeley, November 2016.
  4. Arboreal singularities, Geometric Langlands seminar, Chicago, October 2016.
  5. Lagrangian singularities, Geometric Representation Theory and Beyond, Clay Research Workshop, Oxford, September 2016.
  6. Landau-Ginzburg models, IBS CGP, POSTECH, South Korea, September 2016.
  7. Singularities in symplectic geometry, IBS CGP, POSTECH, South Korea, September 2016.
  8. Arboreal singularities, "Arborealization Day", Stanford, July 2016.
  9. Betti Langlands in genus one, Perverse sheaves of categories, IHES, July 2016.
  10. Arboreal singularities, Symplectic topology, sheaves and mirror symmetry, Paris-Jussieu, July 2016.
  11. Mirror symmetry for pairs of pants, Symplectic Duality and Gauge Theory, Perimeter Institute, April 2016.
  12. Wrapped microlocal sheaves on pairs of pants, Mirror Symmetry and Wall-Crossing, UC Berkeley, March 2016.
  13. Singularities of Lagrangian skeleta, Symplectic Geometry seminar, Stanford, February 2016.
  14. Combinatorics of microlocal sheaves, Lecture series, Arithmetic aspects of moduli spaces, Bernoulli Center, January 2016.
  15. Geometric Hecke operators for real groups, Higgs bundles, real groups, Langlands duality and mirror symmetry, Bernoulli Center, January 2016.
  16. Real geometric Langlands in genus zero, Higgs bundles, real groups, Langlands duality and mirror symmetry, Bernoulli Center, January 2016.
  17. Back in black: geometry's payment plan to number theory, Breakthrough Prize Symposium, Berkeley, November 2015.
  18. Applications of arboreal singularities, Inaugural Conference, Simons Collaboration on Homological Mirror Symmetry, Penn, November 2015.
  19. Real Geometric Langlands, Spectral data for Higgs bundles, AIM, October 2015.
  20. Arboreal Singularities, Factorizable Structures in Topology and Algebraic Geometry, BIRS, August 2015.
  21. Arboreal Singularities, AMS Summer Institute in Algebraic Geometry, Utah, July 2015.
  22. Examples of Betti Langlands, Geometric Unification from Six-Dimensional Physics, BIRS, May 2015.
  23. Arboreal Singularities, Berkeley Math-Physics Meeting, April 2015.
  24. Betti Langlands in genus one, Geometric Langlands and derived algebraic geometry, CIRM, Luminy, April 2015.
  25. D-modules in Representation Theory, Computational algebraic geometry seminar, Berkeley, December 2014.
  26. Combinatorics of microlocal sheaves, Geometric Representation Theory, RIMS, Kyoto, July 2014.
  27. Elliptic character sheaves, Lecture series, Geometric Representation Theory, RIMS, Kyoto, July 2014.
  28. Elliptic character sheaves, Representation Theory, Integrable Systems and Quantum Fields, Northwestern, May 2014.
  29. Affine Character Sheaves, Families of Automorphic Forms and the Trace Formula, Simons Symposium, Puerto Rico, January 2014.
  30. Theory X on a 4-torus, Mathematics of Superconformal Field Theory, Aspen Center for Physics, July 2013.
  31. Geometry of Hecke categories, Lecture series, New Geometric Techniques in Number Theory, MSRI, July 2013.
  32. Morita theory of the affine Hecke category, Lie groups, Lie algebras and their representations, Oregon, April 2013.
  33. Elliptic representation theory, Mathematics Department colloquium, Oregon, April 2013.
  34. Elliptic representation theory, Mathematics Department colloquium, USC, April 2013.
  35. Stable Legendrian skeleta, Joint LA topology seminar, UCLA, April 2013.
  36. Morita theory of the affine Hecke category, Interactions between Noncommutative Algebra, Representation Theory, and Algebraic Geometry, MSRI, April 2013.
  37. Morita theory of the affine Hecke category, Noncommutative algebra seminar, MSRI, March 2013.
  38. Traces and loops, Istanbul Center for Mathematical Sciences (IMBM), Bogazici University, Istanbul, Turkey, November 2012.
  39. Traces and loops, Cahit Arf Lecture, Middle East Technical University, Ankara, Turkey, November 2012.
  40. Traces and loops, Mathematics Department colloquium, Berkeley, October 2012.
  41. Traces and loops, Fields Medal Symposium, Fields Institute, October 2012.
  42. What is Geometric Representation Theory?, Mentor Lecture Series, Berkeley, October 2012.
  43. Lagrangian cobordisms, Topology seminar, Berkeley, October 2012.
  44. Singular support of Lagrangian branes, Andreas Floer Memorial Lecture, Stanford, October 2012.
  45. Hecke operators in Geometric Langlands, Lecture series, Albert-Ludwigs-Universitat Freiburg, Germany, July-August 2012.
  46. Elliptic Character Sheaves, Algebraic Topology, Field Theory and Strings, Simons Center, May 2012.
  47. Fukaya categories as categorical Morse homology, Spring School on Algebraic Microlocal Analysis, Northwestern, May 2012.
  48. Character sheaves for loop groups, Algebraic geometry seminar, UIC, October 2011.
  49. Character sheaves for loop groups, Geometry, Representation Theory and Applications, Berkeley, September 2011.
  50. Elliptic Springer Theory, Nonperturbative Effects and Dualities in QFT and Integrable Systems, KITP, August 2011.
  51. A stable infinity-category of Lagrangian cobordisms, Equivariant Quantum Cohomology, Mirror Symmetry, and Symplectic Geometry, Simons Center, May 2011.
  52. A stable infinity-category of Lagrangian cobordisms, Sheaf-Theoretic Methods in Symplectic Topology, IAS, May 2011.
  53. Elliptic Springer Theory, Representation theory, geometry and combinatorics joint seminar, Berkeley, March 2011.
  54. The Geometric Nature of the Fundamental Lemma, Current Events Bulletin, Joint Mathematics Meetings, New Orleans, January 2011.
  55. Traces in geometry, Lecture series, Hebrew University, December 2010.
  56. A Trinity of Quantizations, Mathematics Department colloquium, Stanford, November 2010.
  57. Loop spaces in derived algebraic geometry, Berkeley-Stanford Algebraic Geometry Colloquium, Stanford, November 2010.
  58. A Trinity of Quantizations, Mathematics Department colloquium, Berkeley, October 2010.
  59. The Fundamental Lemma, Lead speaker at workshop organized by J. Kamnitzer and C. Mautner, Duntroon, Ontario, August 2010.
  60. Traces in geometry, Discrete and continuous geometries, an undergraduate conference, Northwestern, June 2010.
  61. D-modules in representation theory via loop spaces, Lecture series, Geometric Langlands seminar, Chicago, April 2010.
  62. Geometry of character sheaves, Macdonald Polynomials & Geometry, Clay Mathematics Institute, March 2010.
  63. Integral transforms in derived algebraic geometry, Algebraic geometry seminar, Columbia, December 2009.
  64. Perspectives on D-modules, Mathematics Department colloquium, Minnesota, November 2009.
  65. Integral transforms in derived algebraic geometry, Geometric Langlands seminar, Chicago, October-November 2009.
  66. Representation theory via topological field theory, New Contexts in Homotopy Theory: A conference in honor of Peter May on the occasion of his 70th birthday, Chicago, October 2009.
  67. Representation theory via topological field theory, Lecture series, Manifolds, Strings and 2D Quantum Field Theory, Harvard, August 2009.
  68. Character theory of a complex group, Topological Field Theories, Northwestern, May 2009.
  69. Loop spaces in representation theory, American Mathematical Society, Spring Central Section Meeting, UIUC, March 2009.
  70. Homotopical algebra of character sheaves, Representation theory seminar, Chicago, March 2009.
  71. Microlocal branes, Quantum Algebra related to various Topological Field Theories, Kyoto, February 2009.
  72. 3d TFT and character sheaves, Topology seminar, MIT, December 2008.
  73. Microlocal branes, Thursday seminar, Harvard, December 2008.
  74. Representation theory via topological field theory, Invited address, American Mathematical Society, Fall Central Section Meeting, Western Michigan U. October 2008.
  75. A-branes and Hitchin fibers, Gauge Theory and Langlands Duality, KITP, July 2008.
  76. Introduction to Hecke functors and geometric Satake, Gauge Theory and Langlands Duality, KITP, July 2008.
  77. Loop spaces in representation theory, Conference in honor of Nemmers Prize winner Robert Langlands, Northwesternm May 2008.
  78. Some aspects of the geometric Langlands program, Conference in honor of Nemmers Prize winner Robert Langlands, Northwestern, May 2008.
  79. Real groups, Hecke algebras, Langlands program workshop, Northwestern, May 2008.
  80. Representation theory via topological field theory, Midwest Topology Conference, Northwestern, May 2008.
  81. Real groups via base change, Geometric representation theory seminar, IAS, April 2008.
  82. Representation theory via topological field theory, Mathematics Department colloquium, Penn, April 2008.
  83. Springer theory for symplectic geometers, Symplectic Geometry seminar, Columbia, March 2008.
  84. Loop spaces in representation theory, Mathematics Department colloquium, SUNY, Stonybrook, March 2008.
  85. Langlands duality for real groups, Algebro-Geometric Derived Categories and Applications, IAS, March 2008.
  86. Loop spaces in representation theory, Lecture series, Homological Mirror Symmetry and Related Topics, University of Miami, January 2008.
  87. Loop spaces in representation theory, Algebraic Geometry seminar, IAS. February 2008.
  88. Microlocal branes in representation theory, Geometry and Physics seminar, Michigan, December 2007.
  89. Springer theory for symplectic geometers, Geometry seminar, Boston University, November 2007.
  90. Springer theory for symplectic geometers, Symplectic Geometry seminar, MIT, November 2007.
  91. Langlands duality and topological field theory, Quantum Geometry, Aspen Center for Physics, July 2007.
  92. Langlands-Vogan-Mirror Duality, Noncommutative Geometry, Northwestern, May 2007.
  93. Derived Geometric Satake Correspondence, Buildings and Combinatorial Representation Theory, AIM, March 2007.
  94. Loop spaces and Langlands parameters, Representation Theory seminar, Berkeley, April 2007.
  95. Loop spaces and Langlands parameters, Algebraic Geometry seminar, Wisconsin, April 2007.
  96. Loop spaces and Langlands parameters, Lie Groups seminar, MIT, April 2007.
  97. Constructible sheaves and the Fukaya category, Lecture series, Geometric Langlands seminar, Chicago, February 2007.
  98. Microlocal branes, Geometric Langlands and Physics, ESI, Vienna, January 2007.
  99. Morse Theory and Graphs, Graduate Student seminar, Northwestern, January 2006.
  100. Loop spaces and Langlands duality, Representation Theory seminar, Michigan, February 2005.
  101. Loop spaces and Langlands duality, Representation Theory seminar, UIUC, February 2005.
  102. Loop spaces and Langlands duality, Representation Theory seminar, Rutgers, February 2005.
  103. Loop spaces and Langlands duality, Mathematics Department seminar, Northwestern, January 2005.
  104. Loop spaces and Langlands duality, Mathematics Department colloquium, Toronto, January 2005.
  105. Loop spaces and Langlands duality, Geometry seminar, Texas, Austin, January 2005.
  106. Loop spaces and Langlands duality, Representation Theory seminar, Wisconsin, November 2004.
  107. Loop spaces and Langlands duality, Representation Theory seminar, Notre Dame, November 2004.
  108. Real groups and geometric Langlands, American Mathematical Society, Fall Central Section Meeting, Northwestern, October 2004.
  109. Loop spaces and Langlands duality, Representation Theory seminar, Maryland, April 2004.
  110. An elementary model of fusion, Representation Theory seminar, Chicago, March 2004.
  111. Real loop Grassmannians, DARPA Geometric Langlands meeting, Chicago, November 2003.
  112. Affine Grassmannians and Langlands duality, Midwest Workshop in Lie theory, Representation Theory and Automorphic Forms, Notre Dame, April 2002.
  113. Perverse sheaves on real loop Grassmannians, Geometric Langlands seminar, Chicago, April 2002.
  114. Lecture series on loop Grassmannians, Mathematics Department seminar, Wisconsin, March 2000.
  115. Perverse sheaves on real loop Grassmannians, Representation Theory seminar, UMass, Amherst, October 2000.
  116. Beilinson-Drinfeld Grassmannians, Representation Theory seminar, IAS, April 1999.

Professional service

Co-organizer, BIRS workshop: Geometric Unification from Six-Dimensional Physics, May 2015

Co-organizer, MSRI workshop: Geometric Representation Theory, Fall 2014

Co-organizer, Northwestern Masterclass in Gauge Theory, January 2012

Organizer, Special Session, American Mathematical Society, Fall Central Section Meeting, Western Michigan University, October 2008

University of California, Berkeley, Department of Mathematics:
Faculty Appointments Committee: 2013-2014, 2014-2015, 2015-2016, 2016-2017
Prizes Committee: 2015-2016 (Chair)
Graduate Admissions Committee: 2012-2013
Preliminary Exam Committee: 2012-2013

Northwestern University, Department of Mathematics:
Tenure-track and Tenured Hiring Committee: 2007-2008, 2009-2010, 2010-2011
Boas Assistant Professorship Hiring Committee: 2006-2007, 2008-2009 (Chair), 2009-2010 (Chair), 2010-2011 (Chair)
Graduate Committee: 2005-2006, 2010-2011
Budget Committee: 2008-2009, 2009-2010
Pinsky Lecture Series Committee: 2009-2010

Peer review of journal articles and grant proposals:
Advances in Mathematics
American Journal of Mathematics
American Mathematical Monthly
Annales Scientifiques de l'Ecole Normale Superieure
Annals of Mathematics
Bulletin of Mathematical Sciences
Compositio Mathematica
Duke Journal of Mathematics
Forum of Mathematics, Sigma
Geometry & Topology
International Mathematics Research Notices
Inventiones Mathematicae
Journal of Algebra
Journal of the American Mathematical Society
Journal of the European Mathematical Society
Journal of High Energy Physics
Journal of Mathematical Sciences, University of Tokyo
Journal of Symplectic Geometry
Mathematische Zeitschrift
Pure and Applied Mathematics Quarterly
Representation Theory
Selecta Mathematica
Transactions of the American Mathematical Society
Deutsche Forschungsgemeinschaft
French National Research Agency
Israel Science Foundation
National Science Foundation
National Security Agency
Natural Sciences and Engineering Research Council of Canada
Swiss National Science Foundation