Mar.21-23,2016     A. Everett Pitcher Lecture, Lehigh University

Nov.28-29,2015     The 16th Takagi Lectures, The University of Tokyo, Japan.

May 18,2015          30th Shanks Lecture, Vanderbilt University

Oct. 5, 2012           The Edmund R. Michalik Distinguished Lecture Series, University of Pittsburgh

Jan. 17, 2012          2012 McKnight-Zame Distinguished Lecture at University of Miami

Jan. 20-21, 2011     The Fields Institute Distinguished Lecture Series at University of Toronto

Jul. 13, 2010           Distinguished Applied Math. Lecture at National Chiao Tung University

Jul. 11, 2010           2010 NCTS International Conference on Several Complex Variables and Complex

                               Geometry" at the National Center for Theoretical Sciences, Taiwan

Jun. 2010               Workshop "Geometric Analysis and General Relativity" at The Banff International

                               Research Station for Mathematical Innovation and Discovery (BIRS), Canada

Nov.10, 2009         Invariants in Algebraic Geometry at The University of Tokyo, Japan

Sept. 7-8, 2009      Keynote Speaker for the 13th IMA Conference on The Mathematics of Surfaces at York, England. 

Jun. 30, 2009         Distinguished Lecture Series Conference at Taida Institute for Mathematical Sciences

Jun. 18, 2008         IFTP Trieste

May 30, 2008        Scientist Forum at Yunnan, China

May 21, 2008        80th Hirzebruch Conference, Bar Ilan University, Tel Aviv Israel

Mar.11, 2008         IPMU Opening Symposium

Dec. 26, 2007        Indian Mathematics Society

Dec.17-22, 2007    International Congress of Chinese Mathematicians

Aug. 27-31 2007   Geometrie differentielle, Physique mathematique, Mathematiques and societe, IHES France 

May 2007              Distinguished Lecture Series (DLS) 2006-2007 at UCLA.

Jan. 2006               Brauer Lectures, The University of North Carolina at Chapel Hill.

2005                      String 2005, Fields Institute, Toronto

May - Jun. 2005    Andrejewski Lectures, Gottingen, Germany

Sep.-Dec.  2004    Eilenberg Lectures, Department of Mathematics, Columbia University.

May 2004              Bloomberg Lecture, University of Texas at Austin.

2003                      Distinguished Lecture Series, Department of Mathematics, University of California, LA

Oct. 2003              Andre Aisenstadt Chair Lecture Series, Department of Mathematics, University of Montreal

1999                      Hans Rademacher Lecture, Department of Mathematics, University of Pennsylvania

1999                      Stefan Bergman Lecture, Department of Mathematics, Stanford University
1998                      Run Run Shaw Distinguished Lecture, The Chinese University of Hong Kong
1997                      Rufus Bowen Lecture, Department of Mathematics University of California, Berkeley
1988                      American Mathematical Society Colloquium
1983                      James K. Whittemore Lecture, Department of Mathematics, Yale University
1982                      Alexander Ziwet Lecture, Department of Mathematics, University of Michigan, Ann Arbor 

1982                      International Mathematical Union Lecture, Zurich, Switzerland
1981                      The 33rd British Mathematical Colloquium, London Mathematical Society
1979                      Milton Brockett Porter Lecture, Department of Mathematics, Rice University
1978                      International Congress of Mathematicians, Plenary Speaker, Helsinki, Finland