Title
Constant morphisms and constant subcategories
Abstract
In a category supplied with a factorization system for morphisms and a fixed subcategory of constant objects, we introduce suitable notions ofconstant morphism and of the correspondingright andleft constant subcategories. The nature of constant morphisms we use captures two important features of constant subcategories: left-constant subcategories are right-constant in the dual category and the subcategory of constant objects contains relevant information on these subcategories. Furthermore, we present characterizations of constant subcategories in several contexts. Namely, we extend the characterization of disconnectednesses obtained by Hušek and Pumplün, via terminal fans, to our context.
Year
DOI
Venue
1995
10.1007/BF00877632
Applied Categorical Structures
Keywords
Field
DocType
18A32,18B30,18E40,54B30,Factorization system,connectedness,disconnectedness and torsion theory
Discrete mathematics,Topology,Subcategory,Discrete category,Opposite category,Algebra,Factorization system,Morphism,Mathematics
Journal
Volume
Issue
ISSN
3
2
0927-2852
Citations 
PageRank 
References 
1
0.41
1
Authors
1
Name
Order
Citations
PageRank
Maria Manuel Clementino16125.61