Prof. dr hab. Ryszard Urbański, dr Jerzy Grzybowski and dr Hubert Przybycień from 2009-07-05 to 2009-07-08 stayed in Bonn, Germany, where they took part in the 23rd European Conference on Operational Research
Prof. dr hab. Ryszard Urbański held a lecture entitled Reduction of finite exhausters.
Dr Jerzy Grzybowski held a lecture entitled Reduction of infinite exhausters.
Dr Hubert Przybycień held a lecture entitled Completeness of Minkowski-Rådström-Hörmander space.
Furthermore, prof. dr hab. Ryszard Urbański was a co-organizer of two subsections: