Professional societies and administrative service

Congress and workshop organization

• EU workshop in Trondheim, November 1994 (with Smalø, Solberg)
• ICRA 8 in Trondheim/Geiranger, July/August 1996 (with Smalø, Solberg)
• Cluster algebras and cluster-tilted algebras (2006 Bielefeld) (member of organizing committee)
• Representation dimension (2008 Bielefeld) (member of organizing committee)
• Oberwolfach (Representation theory of finte dimensional algebras 2000, 2005), coorganizer with Ringel.
• Member of organising committee for ICRA series (1974-)
• Cluster workshop in Morelia 2008 (member of organizing committee)
• Conference in Trondheim 2009, August