Because of the attack on the computer network of the University of Duisburg-Essen, the ESAGA site currently can be reached only at Links pointing to do not work (but one could manually replace by net), and similarly for content, such as images, at such addresses contained in our pages. (Email messages to addresses are accepted by our mail servers again.)

We apologize for the inconvenience caused by these problems.

Prof. Dr. Ulrich Görtz

Universität Duisburg-Essen,
Fakultät für Mathematik/Institut für Experimentelle Mathematik
Thea-Leymann-Straße 9
45127 Essen

Universität Duisburg-Essen
Fakultät für Mathematik
45117 Essen

Raum: Mathematik-Carrée S-3.02

Tel.: +49 / (0)201 / 18-37656
Fax: +49 / (0)201 / 18-37669
Email: ulrich.goertz - at -

After my course or my seminars, or by appointment (by email).
Ulrich Görtz

Currently my usual email address … does not work because of the system outage at the University of Duisburg-Essen. Please use the address instead.

Use my gpg key to send me encrypted email.