J 2024

Accessible categories with a class of limits

LACK, Stephen and Giacomo TENDAS

Basic information

Original name

Accessible categories with a class of limits

Authors

LACK, Stephen and Giacomo TENDAS (380 Italy, belonging to the institution)

Edition

Journal of Pure and Applied Algebra, Elsevier B.V. 2024, 0022-4049

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10101 Pure mathematics

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Impact factor

Impact factor: 0.800 in 2022

Organization unit

Faculty of Science

DOI

http://dx.doi.org/10.1016/j.jpaa.2023.107444

UT WoS

001034156000001

Keywords in English

Enriched categories; Accessible and locally presentable categories; Sketches and generalizations

Tags

rivok

Tags

International impact, Reviewed
Změněno: 3/1/2024 11:53, Mgr. Marie Šípková, DiS.

Abstract

V originále

In this paper we characterize those accessible V-categories that have limits of a specified class. We do this by introducing the notion of companion C for a class of weights Ψ, as a collection of special types of colimit diagrams that are compatible with Ψ. We then characterize the accessible V-categories with Ψ-limits as those accessibly embedded and C-virtually reflective in a presheaf V-category, and as the V-categories of C-models of sketches. This allows us to recover the standard theorems for locally presentable, locally multipresentable, and locally polypresentable categories as instances of the same general framework. In addition, our theorem covers the case of any weakly sound class Ψ, and provides a new perspective on the case of weakly locally presentable categories.

Links

GA22-02964S, research and development project
Name: Obohacené kategorie a jejich aplikace (Acronym: ECATA)
Investor: Czech Science Foundation
Displayed: 17/11/2024 20:06