The non-triviality of sk? (ZZ ?) -- Stable equivalence of artin algebras -- Some properties of TTF-classes -- Is SK1(Z?)=O for ? a finite abelian group -- Stability for K2 -- The theory of relative grothendieck rings -- The morita context and the construction of QF rings -- On steinberg groups -- Class groups of orders and a mayer-vietoris sequence -- Lie properties in modular group algebras -- K-theory and algebraic correspondences -- The structure of the Witt ring and quotients of abelian group rings -- The schur subgroup of the brauer group -- On the embedding of an order into a maximal order