Schur algebras and isomorphic division algebras
Self-cancellation of torsion-free Abelian groups of finite rank.
Semigroups with a noncommutative arithmetic.
Semisimple Algebras and a Cancellation Law.
Separable adel algebras and a presentation of Weil groups.
Separable Algebren über kommutativen Ringen.
Separable group-ring extensions.
Separable Moduln von Algebren über Ringen.
Separable subalgebras of a class of Azumaya algebras.
SGn of Orders and Group-Rings.
Signatures of fields and extension theory.
Simplification pour les ordres des corps de quaternions totalement définis.
SK1 von Algebren über vollständig diskret bewerteten Körpern und Galoiskohomologie abelscher Körpererweiterungen.
Skew group rings which are Galois.
Some algebraic applications of graded categorical group theory.
Some correspondences for Galois skew group rings.
Some counter-examples in the theory of the Galois module structure of wild extensions
Considering the ring of integers in a number field as a -module (where is a galois group of the field), one hoped to prove useful theorems about the extension of this module to a module or a lattice over a maximal order. In this paper it is show that it could be difficult to obtain, in this way, parameters which are independent of the choice of the maximal order. Several lemmas about twisted group rings are required in the proof.
Some Examples of Orders of Global Dimension Two.
Some necessary conditions for orders to be of finite lattice type. I.
Some necessary conditions for orders to be of finite lattice type. II.