In this paper, we prove the fundamental theorem of crossed Burnside rings and an idempotent formula at characteristic 0.doi:10.1006/jabr.2000.8341Fumihito OdaTomoyuki YoshidaElsevier BVJournal of AlgebraOda, F; Yoshida, T: Crossed Burnside rings III: The Dress construction for a Tambara func- tor...
However, this time it is reduced to a homological statement which is shown to be a consequence a generalization of a theorem of Beauville [B] obtained by the first author [A]. The reader will certainly have noticed that the two theorems are very sim- ...