Prof. Stefan Posch (the director of the institute) opening the colloquium

address by the Dean of the faculty

Prof. Wilfried Grecksch from the Mathematical Institute

Talk by Prof. Helmut Jürgensen

The Theoretical Computer Science Group offering me a fancy cake

Prof. Gerd Wechsung giving a talk

Prof. Klaus Wagner talking about infinite words

Saying ``Thank you all''

The two authors are on the picture below.

Gerd, Klaus and me (from right to left) in the evening at the ``Biergarten''

Günter Berger, Henning Fernau and Stefan Näher
the first from Leipzig and the other two from Trier

Klaus Wagner, Gerd Wechsung and Andreas Brandstädt - colleagues from Jena
now at Würzburg, Jena (retired) and Rostock

three people whom I know from Yerevan

Klara Bauer, Jöran Mielke (front left) and Christoph Bauer (front right)

Evi and me (in the dark)