Zhou, Panyue
Published in
Proceedings - Mathematical Sciences

Let C\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathscr {C}$$\end{document} be a triangulated category with shift functor [1] and R\documentclass[12pt]{minimal} \...

Minuţă, Virgilius-Aurelian
Published in
Acta Universitatis Sapientiae, Mathematica

We develop a group graded Morita theory over a G-graded G-acted algebra, where G is a finite group.

Hrbek, Michal Šťovíček, Jan
Published in
Forum Mathematicum

We classify all tilting classes over an arbitrary commutative ring via certain sequences of Thomason subsets of the spectrum, generalizing the classification for noetherian commutative rings by Angeleri, Pospíšil, ŠÅ¥ovíček and Trlifaj (2014). We show that the n-tilting classes can equivalently be expressed as classes of all modules vanishing in th...

Positselski, Leonid
Published in
Algebras and Representation Theory

We present the definition of a dedualizing complex of bicomodules over a pair of cocoherent coassociative coalgebras C\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$\ma...

Crivei, Septimiu Keskin Tütüncü, Derya
Published in
Mediterranean Journal of Mathematics

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 accessible additive categories, exactly definable additive categories and categories σ[M]\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfo...

Jardan, Ion
Published in
Analele Universitatii "Ovidius" Constanta - Seria Matematica

In the present work two partial operations in the class of preradicals ℙℝ of the category R-Mod of left R-modules are defined and investigated. They are inverse operations for product with respect to meet and coproduct with respect to join. The criteria of existence of such operations are indicated. Main properties of this operation and relations w...

Corbet, René Kerber, Michael
Published in
Journal of Applied and Computational Topology

The Representation Theorem by Zomorodian and Carlsson has been the starting point of the study of persistent homology under the lens of representation theory. In this work, we give a more accurate statement of the original theorem and provide a complete and self-contained proof. Furthermore, we generalize the statement from the case of linear seque...

Sakurai, Taro

From Morita theoretic viewpoint, computing Morita invariants is important. We proved that the intersection of the center and the nth socle ZS^{n}(A) :=Z(A)cap mathrm{S}mathrm{o}mathrm{c}^{n}(A) of a finite dimensional algebra A is Morita invariant; This is a generalization of important Morita invariants, the center Z(A) and the Reynolds ideal ZS^{1...

Yang, Yanjiong Yan, Xiaoguang
Published in
Czechoslovak Mathematical Journal

In this paper, we prove that any pure submodule of a strict Mittag-Leffler module is a locally split submodule. As applications, we discuss some relations between locally split monomorphisms and locally split epimorphisms and give a partial answer to the open problem whether Gorenstein projective modules are Ding projective.

Mao, Lixin
Published in
Algebras and Representation Theory

A morphism f:M→N\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$f: M\rightarrow N$\end{document} of left R-modules is called an n-phantom morphism (resp. a Torn-epimorph...