July 2013: Shing-Tung Yau, Tsinghua
June 2013: Jürg Fröhlich, Zürich Univ.
January 2013: Don Zagier, Max Planck
September 2010: Stanislav Smirnov, Genève Univ.
August 2008: Vaughan Jones, Berkeley
April 2008: Curtis T. McMullen, Havard Univ.
March 2007: Ludwig Faddeev, Steklov Inst.
August 2006: Edward Witten, Princeton