Ronald L. Graham
Department of Computer Science and Engineering
University of California at San Diego
La Jolla, CA 92093-0404 USA
graham@ucsd.edu   

David Kazhdan
Einstein Institute of Mathematics
Edmond J. Safra Campus, Givat Ram
The Hebrew University of Jerusalem
Jerusalem, 91904, Israell
kazhdan@math.huji.ac.il

Anatole Katok
Department of Mathematics
The Pennsylvania State University
University Park, PA 16802-6401 USA
katok_a@math.psu.edu 

Don B. Zagier
Max-Planck-Institut für Mathematik
Vivatsgasse 7 53111 Bonn Germany
Collège de France
11, place Marcelin Berthelot
75231 Paris Cedex 05 France
don.zagier@mpim-bonn.mpg.de 

Efim Zelmanov
Department of Mathematics
University of California at San Diego
9500 Gilman Drive
La Jolla, CA 92093-0112 USA
ezelmano@euclid.ucsd.edu