Anneaux associatifs Associative rings Associative rings and algebras Auslander-Reiten sequences (almost split sequences) and Auslander-Reiten quivers Representation theory of rings and algebras Representations of rings (Algebra) Représentations d'anneaux (Algèbre) Algebraic geometry Algebraic groups Applications différentiables Derivations, actions of Lie algebras Diffeomorphisms Differentiable mappings Difféomorphismes Group actions on varieties or schemes (quotients) Group theory and generalizations Modular representations and characters Reidemeister torsion Representation theory of groups Representation type (finite, tame, wild, etc.) Representations of Artinian rings Representations of algebras Representations of quivers and partially ordered sets Représentations des algèbres Rings and algebras with additional structure Torsion de Reidemeister