Wim H. Hesselink
Bernoulli Institute for Mathematics, Computer Science and Artificial
Faculty of Science and Engineering
University of Groningen
P.O. Box 407, 9700 AK Groningen
telephone +31 50 3633936
fax +31 50 3633800
I am retired since February 2011.
Yet I can sometimes be found in room 374
on the third floor of the Bernoulliborg,
Nijenborgh 9, 9747 AG, Groningen.