Implication details
Claim: If a category has disjoint finite products and has a strict initial object, then it is thin.
Proof: This follows from the dual implication.
This implication has a dual.
Show 69 categories using this implication
- category of algebras
- category of sets equipped with a binary relation
- category of sets equipped with an irreflexive binary relation
- category of sets equipped with a reflexive binary relation
- category of sets equipped with a symmetric binary relation
- category of sets equipped with a symmetric irreflexive binary relation
- category of sets equipped with a symmetric reflexive binary relation
- category of commutative algebras
- category of commutative monoids
- category of commutative rings
- category of small categories
- category of compact Hausdorff spaces
- category of coproducts of Euclidean spaces
- category of F(I)-sets
- category of finite sets and injections
- category of finite groups
- category of finite ordered sets
- category of finite sets
- category of finite sets of odd cardinality
- category of finite sets of cardinality a power of 3
- category of finite-dimensional vector spaces
- category of finite-dimensional vector spaces [countable field]
- category of finite-dimensional vector spaces [finite field]
- category of finite-dimensional vector spaces [uncountable field]
- category of fields of characteristic zero
- category of finitely generated free abelian groups
- category of finitely generated free modules over Z x Z
- category of groups
- category of countable groups
- category of finitely generated groups
- category of Hausdorff spaces
- category of Jónsson-Tarski algebras
- category of locally ringed spaces
- category of M-sets
- category of smooth manifolds
- category of measurable spaces
- category of metric spaces with non-expansive maps
- category of metric spaces with continuous maps
- category of metric spaces with ∞ allowed
- category of monoids
- category of sets with a distinguished subset
- category of pseudo-metric spaces with non-expansive maps
- category of partially ordered sets
- category of preordered sets
- category of finitely generated projective modules over the ring of dual numbers
- category of quivers with finite components
- category of sets and relations
- category of rings
- category of rngs
- category of schemes
- category of semigroups
- category of sets
- category of countable sets
- category of large families of sets
- category of sets with finite-to-one maps
- category of non-empty sets
- category of empty-or-finite pairs of sets
- category of combinatorial species
- category of topological spaces
- category of pointed topological spaces
- category of uniform spaces
- category of large families of vector spaces which are mostly zero
- category of Z-functors
- category of finite Z-sets
- category of Z-sets
- cocompletion of a discrete–pair join
- forked commutative square
- category of simplicial sets
- walking fork