cofiltered-limit-stable epimorphisms
A category has cofiltered-limit-stable epimorphisms if it has cofiltered limits and for every cofiltered diagram of epimorphisms also their limit is an epimorphism.
- Dual property: filtered-colimit-stable monomorphisms
- Related properties: cofiltered limits, exact cofiltered limits
Relevant implications
- biproducts andcofiltered limits andcofiltered-limit-stable epimorphisms andcoproducts implies CSP
- cofiltered limits andright cancellative implies cofiltered-limit-stable epimorphisms
- cofiltered-limit-stable epimorphisms andself-dual implies filtered-colimit-stable monomorphisms
- cofiltered-limit-stable epimorphisms implies cofiltered limits
- exact cofiltered limits implies cofiltered-limit-stable epimorphisms
- filtered-colimit-stable monomorphisms andself-dual implies cofiltered-limit-stable epimorphisms
Examples
There are 21 categories with this property.
- category of finite sets and bijections
- category of finite sets and injections
- delooping of a non-trivial finite group
- delooping of an infinite countable group
- discrete category on two objects
- dual of the category of sets
- empty category
- poset [0,1]
- poset of extended natural numbers
- poset of natural numbers
- poset of ordinal numbers
- proset of integers w.r.t. divisibility
- trivial category
- walking commutative square
- walking composable pair
- walking fork
- walking isomorphism
- walking morphism
- walking parallel pair
- walking span
- walking splitting
Counterexamples
There are 50 categories without this property.
- category of abelian groups
- category of algebras
- category of Banach spaces with linear contractions
- category of combinatorial species
- category of commutative algebras
- category of commutative monoids
- category of commutative rings
- category of countable sets
- category of fields
- category of finite abelian groups
- category of finite groups
- category of finite ordered sets
- category of finite sets
- category of finite sets and surjections
- category of finitely generated abelian groups
- category of free abelian groups
- category of groups
- category of Hausdorff spaces
- category of left modules over a division ring
- category of left modules over a ring
- category of M-sets
- category of measurable spaces
- category of metric spaces with continuous maps
- category of metric spaces with non-expansive maps
- category of metric spaces with ∞ allowed
- category of monoids
- category of non-empty sets
- category of pairs of sets
- category of pointed sets
- category of pointed topological spaces
- category of posets
- category of prosets
- category of pseudo-metric spaces with non-expansive maps
- category of rings
- category of rngs
- category of schemes
- category of sets
- category of sets and relations
- category of sets with finite-to-one maps
- category of sheaves
- category of simplicial sets
- category of small categories
- category of smooth manifolds
- category of topological spaces
- category of vector spaces
- category of Z-functors
- delooping of the additive monoid of natural numbers
- delooping of the additive monoid of ordinal numbers
- simplex category
- walking idempotent
Unknown
There are 2 categories for which the database has no information on whether they satisfy this property. Please help us fill in the gaps by contributing to this project.