Visiting positions

• Visiting Professor, Dec. 18, 2011 - Dec. 26, 2011, National University of Singapore

• Visiting Professor, Sep. 1, 2011 - Nov. 30, 2011, University of Cambridge

• Visiting Fellow, Aug 16-Sep. 11, 2010, Isaac Newton Institute for Mathematical Sciences

• Visiting Professor, Jul. 19, 2009 - Jul. 25, 2009, National University of Singapore

• Visiting Professor, Jan. 15, 2009 - Feb. 15, 2009, University of Cambridge

• Visiting Professor, Feb. 11, 2008 - Feb. 18, 2008, University of Cambridge

• Visiting Scholar, Sep. 2007 - Feb. 2008, University of Wisconsin-Madison

• Visiting Professor, Feb. 20, 2007 - Mar. 3, 2007 University of Vienna

• Visiting Professor, Feb. 1, 2006 - Feb. 16, 2006 University of Vienna

• Visiting Professor, Sep. 2003 - Dec. 2003 University of Wisconsin-Madison

• Postdoc, Sep. 2000 - Jan. 2002 Princeton University