Structure

walking parallel pair

Notation Pair\Pair Objects two objects 00 and 11 Morphisms the two identities and two parallel morphisms from 00 to 11 Related Δ≤1\Delta^{\leq 1}, Fork\Fork, II, ForkSquare\ForkSquare, Quiv\Quiv External nLab link
This category can be pictured as: {0⇉1}\{0 \rightrightarrows 1 \} Its name comes from the fact that a functor Pair→C\Pair \to \C is the same as a parallel 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

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Special morphisms