Projective covers and minimal free resolutions.
Projective k-invariants
Projective Modules over Graded Lie Algebras. I.
Projective objects in the category of chain complexes
Projective resolutions of representations of GL (n).
Projektive geordnete Moduln und n-fache Erweiterungen geordneter Moduln.
Protomodularity, descent, and semidirect products.
Pseudohereditary and pseudocohereditary preradicals
Pullback and pushout squares in a special double category with connection
Quandle coverings and their Galois correspondence
This article establishes the algebraic covering theory of quandles. For every connected quandle Q with base point q ∈ Q, we explicitly construct a universal covering p: (Q̃,q̃̃) → (Q,q). This in turn leads us to define the algebraic fundamental group , where Adj(Q) is the adjoint group of Q. We then establish the Galois correspondence between connected coverings of (Q,q) and subgroups of π₁(Q,q). Quandle coverings are thus formally analogous to coverings of topological spaces, and resemble Kervaire’s...
Quasi resolved semigroups and quintets.
Quasi-abelian categories and sheaves
Quelques résultats de finitude en théorie des invariants
Qu'est-ce que la logique dans une catégorie ?
Question de Whitehead et modules précroisés
Quillen cohomology and Baues-Wirsching cohomology of algebraic, theories
Quotients of unital -categories.
Rad-supplemented modules
Rational fibrations in differential homological algebra.