Generalized periodicity theorems

L Positselski - arXiv preprint arXiv:2301.00708, 2023 - arxiv.org
Let $ R $ be a ring and $\mathsf S $ be a class of strongly finitely presented (FP ${} _\infty $)
$ R $-modules closed under extensions, direct summands, and syzygies. Let $(\mathsf …

Duality pairs, generalized Gorenstein modules, and Ding injective envelopes

J Gillespie, A Iacob - Comptes …, 2022 - comptes-rendus.academie-sciences …
Let R be a general ring. Duality pairs of R-modules were introduced by Holm-Jørgensen.
Most examples satisfy further properties making them what we call semi-complete duality …

Torsion and torsion-free classes from objects of finite type in Grothendieck categories

D Bravo, S Odabaşı, CE Parra, MA Pérez - Journal of Algebra, 2022 - Elsevier
In an arbitrary Grothendieck category, we find necessary and sufficient conditions for the
class of FP n-injective objects to be a torsion class. By doing so, we propose a notion of n …

Finitude homologique des foncteurs sur une catégorie additive et applications

A Djament, A Touzé - Transactions of the American Mathematical Society, 2023 - ams.org
We give sufficient conditions which ensure that a functor of finite length from an additive
category to finite-dimensional vector spaces has a projective resolution whose terms are …

Locally finitely presented and coherent hearts

CE Parra, M Saorín, S Virili - arXiv preprint arXiv:1908.00649, 2023 - ems.press
Starting with a Grothendieck category G and a torsion pair t D. T; F/in G, we study the local
finite presentability and local coherence of the heart Ht of the associated Happel–Reiten …

Finiteness conditions and relative derived categories

L Tan, D Wang, T Zhao - Journal of Algebra, 2021 - Elsevier
In this paper, we introduce a class of exact structures in terms of finiteness conditions of
modules, which are called n-pure exact structures. We investigate the properties of n-pure …

Relative tilting theory in abelian categories I: Auslander-Buchweitz-Reiten approximations theory in subcategories and cotorsion pairs

AA Monroy, OM Hernández - arXiv preprint arXiv:2104.11361, 2021 - arxiv.org
In this paper we introduce a special kind of relative (co) resolutions associated to a pair of
classes of objects in an abelian category $\mathcal {C}. $ We will see that, by studying these …

Cut cotorsion pairs

M Huerta, O Mendoza, MA Pérez - Glasgow Mathematical Journal, 2022 - cambridge.org
We present the concept of cotorsion pairs cut along subcategories of an abelian category.
This provides a generalization of complete cotorsion pairs, and represents a general …

On the K-theory of -categories

E Ellis, R Parra - arXiv preprint arXiv:2207.04918, 2022 - arxiv.org
We relate the notions of Noetherian, regular coherent and regular $ n $-coherent category
for $\mathbb {Z} $-linear categories with finite objects with the corresponding notions for …

On the K-theory of -categories

E Ellis, R Parra - Journal of Homotopy and Related Structures, 2023 - Springer
We establish connections between the concepts of Noetherian, regular coherent, and
regular n-coherent categories for Z-linear categories with finitely many objects and the …