Implication Details
Claim: If a category has a natural numbers object, then it has finite products.
Proof: This holds by definition.
Show 23 categories using this implication
- category of fields
- category of finite ordered sets
- category of finite sets and bijections
- category of finite sets and injections
- category of finite sets and surjections
- category of non-empty sets
- category of sets with finite-to-one maps
- delooping of a non-trivial finite group
- delooping of an infinite countable group
- delooping of an infinite uncountable group
- delooping of the additive monoid of natural numbers
- delooping of the additive monoid of ordinal numbers
- discrete category on two objects
- empty category
- partially ordered collection of ordinal numbers
- partially ordered set of natural numbers
- simplex category
- walking coreflexive pair
- walking fork
- walking idempotent
- walking parallel pair
- walking span
- walking splitting