walking composable pair

Notation Comp\Comp Objects three objects 0,1,20,1,2 Morphisms a single morphism from each natural number to one greater than or equal to it Related Fork\Fork, II External nLab Link

This category can be pictured as: {0→1→2}\{ 0 \to 1 \to 2 \} Its name comes from the fact that a functor Comp→C\Comp \to \C is the same as a composable pair of morphisms in C\C.

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: 22
  • initial object: 00
  • products: infimum taken in {0<1<2}\{0 < 1 < 2\}
  • coproducts: supremum taken in {0<1<2}\{0 < 1 < 2\}

Special morphisms

  • isomorphisms: only the identities
  • monomorphisms: every morphism
  • epimorphisms: every morphism
  • regular monomorphisms: same as isomorphisms
  • regular epimorphisms: same as isomorphisms