Ring Theory, Antwerp 1980

Normalizing extensions I.- Normalizing extensions II.- Commutant des Modules de Longueur Finie sur Certaines Alges Filtr.- Maximal orders applied to enveloping algebras.- Fxtensions of valuations on skew fields.- Extensions of simple by simple unit-regular rings.- Invertible 2 matrices over skew polynomial rings.- Hereditary P. I. algebras.- Grade et Th dintersection en alge Non commutative.- Th de Hopkins pour les Catries de Grothendieck.- The moore-penrose inverse for matrices over skew polynomial rings.- The lattice type of orders: A diagrammatic approach. I.- Arithmetically graded rings .I..- Radicals and chain conditions.- Graded azumaya algebras and brauer groups.- Birationality of P.I. rings and non-commutative varieties.- Skew power series rings and some homological properties of filtered rings.