INVITED TALKS:

• Colloquium Talk, Apallachian State University, Boone, NC, September 19, 2008.
  
  
• International coference on Vertex Operator algebras and related topics, Illinois State
  University, Normal, IL, July 6-11, 2008.
  
  
• Workshop on Lie Theory , University of California at San Diego, February 16-19, 2008.
  
  
• AMS special session on Lie and Representation Theory, MTSU, Murfreesboro, TN, Nov. 3-4, 2007.
  
  
• Colloquium Talk, College of Charlesston, South Carolina, October 12, 2007.
  
  
• Colloquium Talk, Institute of Mathematics, Bhubaneswar, India, July 20, 2006.

• University of Ottawa workshop on  Lie algebras, Ottawa, canada, Mar. 24-26, 2006.

• Workshop on  Kac-Moody Lie algebras and Combinatorics, Banff, Canada, Mar. 26-31, 2005.

• AMS special session on  Representations of Lie algebras, Atlanta, Georgia, Jan. 5-8, 2005.

•  Colloquium talk,  Sophia University, Tokyo, Japan, Sept. 29, 2004.

•  Colloquium talk,  Osaka University, Osaka, Japan, Sept. 13, 2004.

• AMS Summer Research Conference on Representations of Algebraic groups, quantum groups
  and Lie algebras,  Snowbird, Utah, July 11-15, 2004.

• AMS special session on  Lie algebras and conformal field theory, SUNY- Binghamton, Binghamton, Oct. 11-12, 2003.

• AMS special session on  Infinite dimensional Lie algebras and Mathematical Physics,
  Indiana University, Bloomington, Apr. 4-6, 2003.

•  Colloquium talk,  Utkal University, India, July 20, 2002.

• Mid-Atlantic algebra conference, Wake Forest University, Mar. 16-17, 2002.

• Plenary Talk, Conference on  Kac-Moody Lie algebras and applications,

          Ramanujan Institute for Advanced Study, India, Jan. 28-31, 2002.

• AMS special session on  Algebraic structures associated with Lie theory,

          University of South Carolina, Columbia, Mar. 16-18, 2001.

• Conference on  Quasiclassical and Quantum structures, Fields' Institute, Toronto, Canada, Jan. 9-14, 2001.

• AMS special session on  Representation theory of infinite dimensional Lie algebras,

          University of Toronto, Canada, Sept. 23-24, 2000.

• Conference on  Quantum Groups, Morelia, Mexico, Mar. 27-31, 2000.

•  AMS special session on  Representations of Lie algebras, SUNY- Buffalo, NY, Apr. 24-25, 1999.

• Colloquium talk,  University of Virginia, Charlottesville, VA, Sept. 10, 1999.

•  AMS special session on  Noncommutative Algebras, Wake Forest University, NC, Oct. 9-10, 1998.

•  AMS special session on  Representation Theory of Lie algebras, Algebraic groups and Quantum groups,

           Kansas State University, Manhattan, Mar. 27-29, 1998.

•  AMS special session on  Enveloping algebras and Quantum groups, University of Wisconsin,

          Milwaukee, Oct. 24-26, 1997.

•  AMS special session on  VOA's Monstrous Moonshine and related topics, Wayne State University, MI, May 2-4, 1997.

• Mid-Atlantic Algebra Conference, VPI, Blacksburg, April 24-25, 1997.

• Colloquium talk ,  Utkal University, India, July 31, 1996.

• Colloquium talk,  University of Saskatchewan, Canada, June 28,1996.

• Seminar Talk,  Rutgers University, New Brunswick, NJ, June 14, 1996.

•  Lie Algebra Conference , Ohio State University, Columbus, OH, May 27-28, 1996.

• Colloquium talk,  University of Melbourne, Australia, July 24, 1995.

•  Seminar Talk,  Rutgers University, New Brunswick, NJ, Apr. 21,1995.

• Seminar Talks,  UNC-Chapel Hill, Apr. 13 and 20, 1995.

•  Mid-Atlantic Algebra Conference,  VPI, Blacksburg, Virginia, Mar. 31-Apr.1, 1995.

• AMS Special Session on  Groups, Rings and Forms,Richmond, Virginia, November 11-13,1994.

• Joint Summer Research Conference on  Moonshine, The Monster, and related Topics,  South Hadley, MA, June 19-22, 1994.

• Colloquim Talk,  Utkal University, India, on July 21, 1993.

• Seminar Talk, University of Wisconsin, Madison,  October 18, 1993.

• Conference on  Structure and Representation Theory of Lie algebras, Yale University, New Haven, April 10-12, 1992.

•  Conference on  Linear Algebraic Groups, UCLA, Los Angeles, March 25-28, 1992.

• Seminar Talk,  UNC, Chapel Hill,  January 16, 1992.

• CMS Special session on  Discrete Aspect of Lie Theory, Victoria, Canada, December 7-10, 1991.

• Symposium on  Topics in Harmonic analysis on Homogeneous Spaces,  Kyoto University, Kyoto, Japan, July 23-26, 1991.

• Workshop on  Deformation of integrable systems,  Tokyo Metropolitan University, Tokyo, Japan, July 9-11, 1991.

•  Seminar Talk,  University of Wisconsin-Madison,  April 27, 1990.

•  Seminar talk,  UNC-Chapel Hill,  April 18, 1990.

•  Colloquium Talk,  Hiroshima University, Hiroshima, Japan,  January 9, 1990.

• Colloquium Talk,  Waseda University, Tokyo, Japan,  January 11, 1990.

• Joint Summer Research Conference on  Deformation theory of algebras and quantization

         with application to physics,  Amherst, MA, June 14-20, 1990.

• Seminar Talk,  RIMS, Kyoto University,  Japan, January 16, 19, and 23, 1990.

• AMS Special Session on  Infinite-dimensional symmetries in mathematics and physics, 

         Worcester, Massachusetts, April 15-16, 1989.

• Conference on  Lie algebras and related topics, University of Wisconsin-Madison, May 22-31, 1988.

• Ramanujan Centenary Conference, University of Illinois at Urban-Champaign, June 1-5, 1987.

• Symposium on  Topological and Geometrical Methods in Field Theory,  Espoo, Finland, June 8-14, 1986.

• Conference on  Infinite-dimensional Lie algebras and groups,  Oberwolfach, West Germany, Apr. 21-27, 1985.

• Workshop on  Vertex operators in mathematics and physics,  MSRI, Berkeley, CA, Nov. 9-16, 1983.