indiscrete category of sets

Notation Setindisc⁡\Set_{\indisc} Objects sets Morphisms for every pair of sets X,YX,Y exactly one morphism X→YX \to Y Related Set\Set, Setdisc⁡\Set_{\disc}

This category provides an example of a large indiscrete category. More generally, every collection II yields an indiscrete category Iindisc⁡I_{\indisc}, and it shares the same properties as this one as long as II is uncountable and not small.

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

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Special morphisms

  • isomorphisms: every morphism
  • monomorphisms: every morphism
  • epimorphisms: every morphism
  • regular monomorphisms: same as isomorphisms
  • regular epimorphisms: same as isomorphisms