Amsterdam, July 14-18, 2008
Organized by Vrije Univeristeit, Centrum voor Wiskunde en Informatica and Universiteit van Amsterdam

Stockholm, June 27 –July 2, 2004
Organised by Royal Institute of Technology in Stockholm and Stockholm University

Barcelona, July 10-14, 2000

Budapest, July 22-26, 1996
Organised by János Bolyai Mathematical Society

Paris, July 6-10, 1992
Organised by the Société Mathématique de France (SMF) and the Société Mathématiques Appliquées et Industrielles (SMAI)