ALGB seminar: Ofir Schnabel (Haifa, Israel)

Titel : Classifying crossed products up to several graded equivalence relations

Abstract: A graded algebra is a crossed product if every homogeneous component admits an invertible element. Hence, natural examples of crossed products are group algebras, twisted group algebras, skew group algebras and graded division algebras. We will define some natural equivalence relations on graded algebras and we will illustrate how to classify crossed products up to these equivalence relations in terms of orbits with respect to certain group actions on crossed products. No prior knowledge is required. This is joint work with Yuval Ginosar.