Postal address
University of Cologne
Division of Mathematics
Weyertal 86 – 90
50931 Köln
Germany

Office address
Gyrhofstraße 8a
(Building 158b)
1st floor – room 1.203

Phone
+49 221 470 6093

Email
a.sikstel(at)uni-koeln.de

Office hours
By arrangement (please send an e-mail).