Baer–Kaplansky classes in Grothendieck categories and applications

S Crivei, D Keskin Tütüncü - Mediterranean Journal of Mathematics, 2019 - Springer
Abstract We study Baer–Kaplansky classes in Grothendieck categories. We apply our results
to functor categories, and discuss the transfer of the Baer–Kaplansky property to finitely …

Baer-Kaplansky classes in categories: transfer via functors

S Crivei, DK Tütüncü, R Tribak - Communications in Algebra, 2020 - Taylor & Francis
We study the transfer of Baer-Kaplansky classes via additive functors between preadditive
categories. We show that the Baer-Kaplansky property is well behaved with respect to fully …

Pre-Galois categories and Fra\" iss\'e's theorem

N Harman, A Snowden - arXiv preprint arXiv:2301.13784, 2023 - arxiv.org
Galois categories can be viewed as the combinatorial analog of Tannakian categories. We
introduce the notion of pre-Galois category, which can be viewed as the combinatorial …

Rickart and dual Rickart objects in abelian categories: Transfer via functors

S Crivei, G Olteanu - Applied Categorical Structures, 2018 - Springer
We study the transfer of (dual) relative Rickart properties via functors between abelian
categories, and we deduce the transfer of (dual) relative Baer property. We also give …

Admissible Galois structures and coverings in regular Mal'cev categories

V Rossi - Applied Categorical Structures, 2006 - Springer
Given a regular Gumm category \mathcalC such that any regular epimorphism is effective for
descent, we prove that any Birkhoff subcategory \mathcalX in \mathcalC gives rise to an …

A Baer-Kaplansky Theorem in additive categories

S Crivei, D Keskin Tütüncü, R Tribak - Ring Theory 2019 …, 2021 - World Scientific
We prove the following Baer-Kaplansky Theorem in additive categories. If M and N are
objects of an additive category C such that:(1) M= A⨁ X and N= B⨁ X for some objects A, B …

An introduction to regular categories

M Gran - New Perspectives in Algebra, Topology and …, 2021 - Springer
This paper provides a short introduction to the notion of regular category and its use in
categorical algebra. We first prove some of its basic properties, and consider some …

Transfer of CS-Rickart and dual CS-Rickart properties via functors between abelian categories

S Crivei, SM Radu - Quaestiones Mathematicae, 2022 - Taylor & Francis
We study the transfer of (dual) relative CS-Rickart properties via functors between abelian
categories. We consider fully faithful functors as well as adjoint pairs of functors. We give …

Strongly Rickart objects in abelian categories: Applications to strongly regular and strongly Baer objects

S Crivei, G Olteanu - Communications in Algebra, 2018 - Taylor & Francis
We show how the theory of (dual) strongly relative Rickart objects may be employed in order
to study strongly relative regular objects and (dual) strongly relative Baer objects in abelian …

[HTML][HTML] A generalization of the Gabriel–Popescu theorem

W Lowen - Journal of Pure and Applied Algebra, 2004 - Elsevier
In this paper we give necessary and sufficient conditions for an additive functor u: u→ C,
from a small pre-additive category u to a Grothendieck category C, to realize C as a …