Structure

walking morphism representation

Notation F:I→SetF: I \to \Set Domain walking morphismCodomain category of sets
This is the functor I→SetI \to \Set that maps the universal morphism 0→10 \to 1 to the unique map ∅→{∗}\varnothing \to \{\ast\} in Set\Set. It provides a very simple example of a functor that preserves coequalizers (and hence regular epimorphisms) but does not preserve epimorphisms.

Satisfied properties

Assigned properties

Deduced properties

Unsatisfied properties

Assigned properties

Deduced properties*

*This also uses the deduced satisfied properties.

Unknown properties

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