On cohomological periodicity for infinite groups.
On cohomology of graded group categories
On derived categories and derived functors.
On Gruenberg Resolutions for Augmented Algebras.
On long exact -sequences in module theory.
On projective resolutions of flat modules
On relative extension groups in the category of commutative diagrams.
On the Bernstein-Gelfand-Gelfand resolution and the Duflo sum formula
On the Buchsbaum-Eisenbud theory of finite free resolutions.
On the deviations of a local ring.
On the equivalence of Quillen's and Swan's -theories.
On the geometry of intuitionistic S4 proofs.
On the homology of small categories and asynchronous transition systems.
One-sided Gorenstein subcategories
We introduce the right (left) Gorenstein subcategory relative to an additive subcategory of an abelian category , and prove that the right Gorenstein subcategory is closed under extensions, kernels of epimorphisms, direct summands and finite direct sums. When is self-orthogonal, we give a characterization for objects in , and prove that any object in with finite -projective dimension is isomorphic to a kernel (or a cokernel) of a morphism from an object in with finite -projective dimension...
Orientations and multiplicative structures of resolutions.