Structure

category of Z-functors

Notation [CRing,Set][\CRing, \Set] Objects Z-functors, i.e. functors from commutative rings to sets Morphisms natural transformations Related SchR\Sch_R, Set\Set, SetI\Set^I External nLab link
This category is used in functorial algebraic geometry. It also provides a typical example of a functor category that is not locally small, but nevertheless relevant. Most of its properties are directly derived from the category of sets, so other functor categories [C,Set][\C, \Set] for large categories C\C will be similar.

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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Special objects

  • terminal object: constant functor with value {∗}\{\ast\}
  • initial object: constant functor with value ∅\varnothing
  • products: pointwise defined direct product
  • coproducts: pointwise disjoint union

Special morphisms