Invited Lectures and Colloquia

  • Invited Speaker, International Congress of Mathematicians 2018, Rio de Janeiro, Brazil, Aug. 1 - 9, 2018

  • The Vietnam-USA Joint Mathematical Meeting, QuyNhon, Vietnam, June 10 - 13, 2019

  • Plenary Speaker, 2019 Canadian Mathematical Society Summer Meeting, Regina, Canada, June 7 - 10, 2019

  • The Twenty First Andrzej Jankowski Memorial Lecture, Mathematical Institute of Gdansk University, Gdansk, Poland, May 10, 2019

  • Algebra Seminar, University of Florida, Gainesville, FL, April 22, 2019.

  • Representations of Finite Groups, Oberwolfach, Germany, March 24 - 30, 2019

  • Number Theory/Representation Theory Seminar, University of Toronto, Toronto, Canada, March 20, 2019

  • Groups, Geometries, and Representations, Oxford, UK, Sep. 3 - 7, 2018

  • Simple Groups: New Perspectives and Applications, Bristol, UK, Aug. 29 - 31, 2018

  • Number Theory and Arithmetic Geometry RTG Workshop, University of California, Berkeley, CA, April 30 - May 4, 2018

  • Colloquium, Department of Mathematics, University of California Santa Cruz, Santa Cruz, CA, Jan. 30, 2018

  • Colloquium, Department of Mathematics, University of Michigan, Ann Arbor, MI, Sep. 29, 2017

  • Sustech Summer Program in Algebra, Sustech, Shenzhen, China, July 16 - 29, 2017

  • Local Representation Theory and Simple Groups, Centre Interfacultaire Bernoulli, EPFL, Lausanne, Switzerland, July 1 - Dec. 31, 2016

  • Permutation Groups, BIRS, Banff, Canada, Nov. 13 - 18, 2016

  • Groups and Geometry Seminar, University of Geneve, Switzerland, Nov. 8, 2016

  • Bernoulli Lecture, Centre Interfacultaire Bernoulli, EPFL, Lausanne, Switzerland, Oct. 20, 2016

  • Summer School ``Representation Theory of Finite and p-adic Groups'', Vietnam Institute for Advanced Study in Mathematics (VIASM), Hanoi, Vietnam, Aug. 29 - Sep. 1, 2016

  • Conference in Finite Groups and Vertex Algebras, Academia Sinica, Taipei, Taiwan, Aug. 22 - 26, 2016

  • Minicourse ``Introduction to Group Representation Theory'', Vietnam Institute for Advanced Study in Mathematics (VIASM), Hanoi, Vietnam, June 6 - 9, 2016

  • Branching Problems for Reductive Groups, Institut Mittag-Leffler, Djursholm, Sweden, May 16 - 20, 2016

  • Simple Groups, Representations, and Related Topics, A Conference in Honour of Martin Liebeck and Jan Saxl, University of Cambridge, UK, July 13 - 15, 2015

  • Vietnam Institute for Advanced Study in Mathematics (VIASM), Hanoi, Vietnam, June 16, 2015

  • Algebra/Number Theory Seminar, Institute of Mathematics, Vietnam Academy of Science and Technology, Hanoi, Vietnam, June 10, 2015

  • Geometric Langlands Seminar, University of Chicago, Chicago, IL, May 19, 2015

  • Number Theory Seminar, Northwestern University, Evanston, IL, May 13, 2015

  • Representations of Finite Groups, Oberwolfach, Germany, April 5 - 11, 2015

  • London Algebra Colloquium, City University London, London, UK, April 2, 2015

  • Representations of Finite Groups and Algebraic Groups, Ecole de Physique des Houches, France, Feb. 9 - 13, 2015

  • Lie Groups Seminar, Department of Mathematics, MIT, Cambridge, MA, Nov. 12, 2014

  • Princeton University/IAS Number Theory Seminar, Princeton University, Princeton, NJ, Nov. 6, 2014

  • Colloquium, Department of Mathematics, Tufts University, Medford, MA, Oct. 17, 2014

  • Number Theory Seminar, Department of Mathematics, Harvard University, Cambridge, MA, Oct. 15, 2014

  • Colloquium, Department of Mathematics, Yale University, New Haven, CT, Oct. 8, 2014

  • Colloquium, Department of Mathematics, University of Wisconsin, Madison, WI, Oct. 3, 2014

  • Algebra Seminar, Department of Mathematics, Brown University, Providence, RI, Sep. 29, 2014

  • Colloquium, Department of Mathematics, University of Southern California, Los Angeles, CA, March 5, 2014

  • Mathematics of John Thompson, Conference on Finite Groups and Related Topics, University of Cambridge, Cambridge, UK, Sept. 8 - 11, 2013

  • The 8th Congress of Vietnamese Mathematicians, Nhatrang, Vietnam, Aug. 10 - 14, 2013

  • Colloquium, Department of Mathematics, Mechanics, and Informatics, Hanoi University of Science, National University of Vietnam, Hanoi, Vietnam, June 6, 2013

  • Annual Meeting of the Deutsche Forschungsgemeinschaft (DFG) Priority Programme on Representation Theory SPP 1388, Bad Boll, Germany, March 25 - 28, 2013

  • Bourbaki Seminar, G. Malle's lecture, March 23, 2013

  • Colloquium, Department of Mathematics, University of Southern California, Los Angeles, CA, Nov. 9, 2012

  • Groups and Geometries, BIRS, Banff, Canada, Sept. 2 - 7, 2012, Videotaped lectures

  • Colloquium, Institute of Mathematics, Vietnam Academy of Science and Technology, Hanoi, Vietnam, June 22, 2012

  • National University of Vietnam and Hanoi Institute of Mathematics, Hanoi, Vietnam, June-July 2012

  • Words and Growth, The 16th Midrasha Mathematicae, Institute for Advanced Studies, Jerusalem, Israel, June 10 - 15, 2012, Videotaped lectures

  • Colloquium, Department of Mathematics, University of Oregon, Eugene, OR, May 18, 2012

  • Representations of Finite Groups, Oberwolfach, Germany, March 25 - 31, 2012

  • Invited Address, 2012 AMS Spring Western Section Meeting, University of Hawaii at Manoa, Honolulu, HI March 3 - 4, 2012

  • Group Theory Seminar, EPFL, Lausanne, Switzerland, July 7, 2011

  • Linear Groups and Group Representations: Classification Problems, Milan, Italy, July 4 - 6, 2011

  • Colloquium, Department of Mathematics, University of Wisconsin, Madison, WI, March 25, 2011

  • Global/Local Conjectures in Representation Theory of Finite Groups, BIRS, Banff, Canada, March 13 - 18, 2011

  • National University of Vietnam and Hanoi Institute of Mathematics, Hanoi, Vietnam, July 2010

  • Colloquium, Department of Mathematics, University of Oregon, Eugene, OR, May 11, 2010

  • Number Theory Seminar, Harvard University, Cambridge, MA, April 28, 2010

  • Permutation Groups, BIRS, Banff, Canada, July 19 - 24, 2009

  • Conference on Character Theory of Finite Groups in honor of Marty Isaacs, Valencia, Spain, June 3 - 5, 2009

  • Group Theory, Geometry and Representation Theory: Abel Prize 2008, Newton Institute, Cambridge, UK, May 27 - 29, 2009

  • Algebra Seminar, Oxford University, Oxford, UK, May 25, 2009

  • London Algebra Colloquium, Imperial College, London, UK, May 21, 2009

  • Algebra Seminar, University of Cambridge, Cambridge, UK, May 20, 2009

  • Colloquium, Department of Mathematics, University of Kent, Canterbury, UK, May 18, 2009

  • Topics in Algebra, in honor of Alexandre E. Zalesskii, Milan, Italy, May 13 - 15, 2009

  • Representations of Finite Groups, Oberwolfach, Germany, March 22 - 28, 2009

  • Algebra Seminar, University of Southern California, Los Angeles, CA, Feb. 23, 2009

  • Caltech Geometry and Topology Seminar, California Institute of Technology, Pasadena, CA, Nov. 14, 2008

  • MSRI Seminar on representations of finite groups of Lie type, MSRI, Berkeley, CA, May 14, 2008

  • Algebra Seminar, University of California, San Diego, CA, Feb. 21, 2008

  • Group Representations and Combinatorics, University of Florida, Sept. 10 - 14, 2007

  • Permutation Groups, Oberwolfach, Germany, August 5 - 11, 2007

  • Around Broue Conjectures, CIRM, Marseille, France, May 28 - June 1, 2007

  • Colloquium, Department of Mathematics, University of Wisconsin, Madison, WI, Sept. 29, 2006

  • Representations of Finite Groups, Oberwolfach, Germany, March 26 - April 1, 2006

  • Conference on Algebraic Groups and Finite Reductive Groups, Bernoulli Center, EPFL, Lausanne, Switzerland, June 13 - 17, 2005

  • Group Representation Theory, Bernoulli Center, EPFL, Lausanne, Switzerland, Jan. - June 2005

  • Second COE Workshop on Sphere Packings, Kyushu University, Fukuoka, Japan, May 30 - June 3, 2005

  • Gitter und Anwendungen, Oberwolfach, Germany, Jan. 2 - 7, 2005

  • Hanoi Institute of Mathematics, Hanoi, Vietnam, Oct. 21, 2003

  • Algebra Seminar, University of Cambridge, Cambridge, UK, June 18, 2003

  • Algebra Seminar, University of East Anglia, Norwich, UK, June 9, 2003

  • Darstellungen endlicher Gruppen, Oberwolfach, Germany, March 24 - 28, 2003

  • Arithmetique et combinatoire, CIRM, Luminy, Marseille, France, Sept. 23 - 27, 2002

  • Groups and Geometries, Oberwolfach, Germany, Sept. 2 - 6, 2002

  • Hanoi Institute of Mathematics, Hanoi, Vietnam, June 3, 2002

  • Hanoi Institute of Mathematics, Hanoi, Vietnam, March 14, 2002

  • Colloquium, Department of Mathematics, Wesleyan University, Middletown, CT, March 1, 2002

  • Algebra Seminar, University of Southern California, Los Angeles, CA, Nov. 12, 2001

  • Durham Symposium on Groups, Geometry and Combinatorics, July 16-26, 2001

  • Reseaux et Formes Quadratiques, CIRM, Luminy, Marseille, France, Sept. 25 - 29, 2000

  • Group Theory and Representations, Algebra 2000 Summer School and Workshop, Edmonton, Canada, July 3 - 7, 2000

  • INdAM Conference on Applications of Simple Groups/Computational Group Theory, Milan, May 8-12, 2000

  • Number Theory Seminar, Harvard University, Cambridge, MA, Oct. 20, 1999

  • Representations of finite groups, Oberwolfach, Germany, June 21 - 26, 1999

  • Colloquium, Department of Mathematics, University of Erlangen, Erlangen, Germany, June 29, 1999

  • Algebra Seminar, RWTH, Aachen, Germany, June 14, 1999

  • Colloquium, Institute for Experimental Mathematics, Essen, Germany, June 7, 1999

  • Algebra and Topology Seminar, ETH Zurich, Zurich, Switzerland, May 31, 1999

  • Algebra Day, Institute for Experimental Mathematics, Essen, Germany, May 28, 1999

  • Colloquium, Department of Mathematics, University of Oregon, Eugene, OR, May 3, 1999

  • Colloquium, Department of Mathematics, University of Iowa, Iowa City, IA, Febr. 25, 1999

  • Integral Quadratic Forms and Lattices, Seoul National University, Seoul, South Korea, June 15 - 19, 1998

  • Symposium on modular representations of finite groups, University of Virginia, Charlottesville, VA, May 9 - 15, 1998

  • Quadratic Forms and Orthogonal Groups, University of Notre Dame, Notre Dame, IN, May 2 - 4, 1998

  • Colloquium, Department of Mathematics, Kent State University, Kent, Ohio, April 23, 1998

  • NATO Advanced Institute on Modular Representation Theory and Subgroup Structure of Algebraic Groups and Related Finite Groups, Isaac Newton Institute, University of Cambridge, UK, June 15 - July 5, 1997

  • Linear Groups, Levico, Italy, Sept. 3 - 9, 1995

  • Ganzzahlige quadratische Formen und Gitter, Oberwolfach, Germany, Aug. 20 - 26, 1995

  • Gruppen und Geometrien, Oberwolfach, Germany, Aug. 21--26, 1994

  • 1994 Canadian Mathematimatical Society Annual Seminar ''Representations of Groups, Finite, Lie, Quantum'', Banff, Canada, June 14--25, 1994

  • Darstellungtheorie endlicher Gruppen, Oberwolfach, Germany, Sept. 29 - Oct. 2, 1992

  • Algebraische Gruppen, Oberwolfach, Germany, Apr. 7--13, 1991

  • Endlichdimensionale Lie-Algebren, Oberwolfach, Germany, Febr. 10 - 16, 1991