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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