The radical of functorially finite subcategories

R Diyanatnezhad, A Nasr-Isfahani - Journal of Algebra, 2024 - Elsevier
Let Λ be an artin algebra and C be a functorially finite subcategory of mod Λ which contains
Λ or DΛ. We use the concept of the infinite radical of C and show that C has an additive …

Minimal infinite submodule-closed subcategories

CM Ringel - Bulletin des Sciences Mathématiques, 2012 - Elsevier
Let Λ be an artin algebra. We are going to consider full subcategories of modΛ closed under
finite direct sums and under submodules with infinitely many isomorphism classes of …

A note on the radical of a module category

C Chaio, S Liu - Communications in Algebra, 2013 - Taylor & Francis
We characterize the finiteness of the representation type of an artin algebra in terms of the
behavior of the projective covers and the injective envelopes of the simple modules with …

[引用][C] Extensions of homologically finite subcategories

SA Sikko, SO Smalø - Archiv der Mathematik, 1993 - Springer
Introduction. The study of homologically finite subcategories has turned out to be important
in several contexts, especially in the representation theory of artin algebras. In this paper we …

A functorial approach to monomorphism categories II: Indecomposables

N Gao, J Külshammer, S Kvamme… - Proceedings of the …, 2024 - Wiley Online Library
We investigate the (separated) monomorphism category mono (Q, Λ) $\operatorname
{mono}(Q,\Lambda) $ of a quiver over an Artin algebra Λ $\Lambda $. We show that there …

[PDF][PDF] Approximations and almost split sequences in homologically finite subcategories

M Kleiner - Journal of Algebra, 1997 - core.ac.uk
In this paper, is an artin algebra over a commutative artinian ring R, the radical of is denoted
by r, and mod is the category of finitely wx generated left-modules. The definitions, notation …

[HTML][HTML] Finite cycles of indecomposable modules

P Malicki, JA de la Peña, A Skowroński - Journal of Pure and Applied …, 2015 - Elsevier
We solve a long standing open problem concerning the structure of finite cycles in the
category mod A of finitely generated modules over an arbitrary artin algebra A, that is, the …

Irreducible morphisms in the bounded derived category

R Bautista, MJS Salorio - Journal of Pure and Applied Algebra, 2011 - Elsevier
We study irreducible morphisms in the bounded derived category of finitely generated
modules over an Artin algebra Λ, denoted Db (Λmod), by means of the underlying category …

The left and the right parts of a module category

I Assem, FU Coelho, S Trepode - Journal of Algebra, 2004 - Elsevier
In this paper, we study, for an artin algebra, the class LA (and RA) which is a full subcategory
of the category modA of finitely generated A-modules, and which consists of all …

Duality and contravariant functors in the representation theory of artin algebras

S Dean - Journal of Algebra and Its Applications, 2019 - World Scientific
We know that the model theory of modules leads to a way of obtaining definable categories
of modules over a ring R as the kernels of certain functors (RM od) op→ A b rather than of …