La K-théorie stable
Lattices of orthogonal theories
Laura algebras and quasi-directed components
Using a notion of distance between indecomposable modules we deduce new characterizations of laura algebras and quasi-directed Auslander-Reiten components. Afterwards, we investigate the infinite radical of Artin algebras and show that there exist infinitely many non-directing modules between two indecomposable modules X and Y if . We draw as inference that a convex component is quasi-directed if and only if it is almost directed.
Left EM rings
Let be the polynomial ring over a ring with unity. A polynomial is referred to as a left annihilating content polynomial (left ACP) if there exist an element and a polynomial such that and is not a right zero-divisor polynomial in . A ring is referred to as left EM if each polynomial is a left ACP. We observe the structure of left EM rings with various properties, and study the relationships between the one-sided EM condition and other standard ring theoretic conditions. Moreover,...
Left global dimensions and inverse polynomial modules.
Left sections and the left part of an artin algebra
We define a notion of left section in an Auslander-Reiten component, by weakening one of the axioms for sections. We derive a generalisation of the Liu-Skowroński criterion for tilted algebras, then apply our results to describe the Auslander-Reiten components lying in the left part of an artin algebra.
Left-sided quasi-invertible bimodules over Nakayama algebras
Bimodules over triangular Nakayama algebras that give stable equivalences of Morita type are studied here. As a consequence one obtains that every stable equivalence of Morita type between triangular Nakayama algebras is a Morita equivalence.
Les -algèbres à homotopie près
On étudie dans cet article les notions d’algèbre à homotopie près pour une structure définie par deux opérations et . Ayant déterminé la structure des algèbres et des algèbres, on généralise cette construction et on définit la stucture des -algèbres à homotopie près. Etant donnée une structure d’algèbre commutative et de Lie différentielle graduée pour deux décalages des degrés donnés par et , on donnera une construction explicite de l’algèbre à homotopie près associée et on précisera...
L’espace classifiant de la -théorie algébrique
Limits of tilting modules
We study the problem of when a direct limit of tilting modules is still a tilting module.
Local cohomology in classical rings.
The aim of this paper is to establish the close connection between prime ideals and torsion theories in a non necessarily commutative noetherian ring. We introduce a new definition of support of a module and characterize some kinds of torsion theories in terms of prime ideals. Using the machinery introduced before, we prove a version of the Mayer-Vietoris Theorem for local cohomology and establish a relationship between the classical dimension and the vanishing of the groups of local cohomology...
Localisation de formes quadratiques
Localisation de formes quadratiques. II
Locally compact Baer rings.
Locally free modules
Logarithmic Descriptions of K1' (Zp G) and Classgroups of Symmetric Groups.
Lower central series, augmentation quotients and homology of groups.
L-Theory and the Arf Invariant.