Happy Birthday, Helmut Wielandt
(wherever you may be)

Cover illustration,
AMS Notices, January 2004

In light of my entry on change-ringing of this date last year, the above AMS Notices cover may serve to illustrate what Heidegger so memorably dubbed the

 "Geheimnis des Glockenturms."

For details on the illustration,
click here and scroll down.

(Wielandt was an expert
on permutation groups.)