Results 61 to 70 of about 7,261 (161)

Class-locally presentable and class-accessible categories

open access: yesJournal of Pure and Applied Algebra, 2012
In this paper the authors consider generalisations of accessibility and local presentability for categories. A category is accessible if it has a completeness property and if every object is a colimit in a suitable way of a set of suitable objects. For class-accessibility one allows a proper class of objects rather than a set.
Chorny, B., Rosický, J.
openaire   +1 more source

Groups with exotic finiteness properties from complex Morse theory

open access: yesJournal of Topology, Volume 18, Issue 1, March 2025.
Abstract Recent constructions have shown that interesting behaviours can be observed in the finiteness properties of Kähler groups and their subgroups. In this work, we push this further and exhibit, for each integer k$k$, new hyperbolic groups admitting surjective homomorphisms to Z${\mathbb {Z}}$ and to Z2${\mathbb {Z}}^{2}$, whose kernel is of type ...
Claudio Llosa Isenrich, Pierre Py
wiley   +1 more source

Coderived and contraderived categories of locally presentable abelian DG-categories

open access: yesMathematische Zeitschrift
AbstractThe concept of an abelian DG-category, introduced by the first-named author in Positselski (Exact DG-categories and fully faithful triangulated inclusion functors. arXiv:2110.08237 [math.CT]), unites the notions of abelian categories and (curved) DG-modules in a common framework.
Positselski, L. (Leonid)   +1 more
openaire   +3 more sources

An exploratory study on excess weight gain: Experiences of Postmenopausal Women in Ghana. [PDF]

open access: yesPLoS One, 2023
Mensah Bonsu I   +5 more
europepmc   +1 more source

Locally class-presentable and class-accessible categories

open access: yes, 2011
We generalize the concepts of locally presentable and accessible categories. Our framework includes such categories as small presheaves over large categories and ind-categories. This generalization is intended for applications in the abstract homotopy theory.
Chorny, Boris, Rosicky, Jiri
openaire   +2 more sources

On regular monomorphisms in weakly locally presentable categories

open access: yesJournal of Pure and Applied Algebra, 1997
\textit{J. Adámek}, \textit{H. Hu} and the reviewer [J. Pure Appl. Algebra 107, No. 1, 1-8 (1996; Zbl 0852.18002)] showed that in a \(\kappa\)-accessible category \({\mathcal A}\) with pushouts, regular monomorphisms are closed under \(\kappa\)-directed colimits in \({\mathcal A}^2\) (the arrow category of \({\mathcal A})\), which implies that \(\kappa\
Hu, Hongde, Pelletier, J.Wick
openaire   +2 more sources

Covers, envelopes, and cotorsion theories in locally presentable abelian categories and contramodule categories

open access: yesJournal of Algebra, 2017
We prove general results about completeness of cotorsion theories and existence of covers and envelopes in locally presentable abelian categories, extending the well-established theory for module categories and Grothendieck categories. These results are then applied to the categories of contramodules over topological rings, which provide examples and ...
Positselski, L., Rosický, J.
openaire   +3 more sources

Food Hygiene Practices and Associated Factors Among Street Food Vendors in Urban Areas of Gedeo Zone, Southern Ethiopia. [PDF]

open access: yesEnviron Health Insights, 2023
Negassa B   +7 more
europepmc   +1 more source

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