WORKSHOP ON CATEGORICAL GROUPS June 16 to 20, 2008 Institut de Matemàtica de la Universitat de Barcelona This is an event within the CRM thematic year on Homotopy Theory and Higher Categories (http://www.crm.cat/hocat/). The workshop will focus on recent developments in the theory of categorical groups and related topics, as well as their applications to higher-order geometry and theoretical physics. The following have agreed to give keynote talks: - John Baez (University of California at Riverside) - André Joyal (Université du Québec à Montréal) - Behrang Noohi (Florida State University) - Tim Porter (National University of Ireland) - Enrico Vitale (Université Catholique de Louvain) Further information will gradually be made available at http://mat.uab.cat/~kock/crm/hocat/cat-groups/. The deadline for registration is May 31, 2008. The organisers, Pilar Carrasco Josep Elgueta Joachim Kock Antonio Rodríguez Garzón