English
For P,Q in the product C × (C ⥤ Type), α : P ⟶ Q and β ∈ (coyonedaPairing C).obj P, the pairing map equals the composition coyoneda.map α.fst.op ≫ β ≫ α.snd.
Русский
Для P,Q ∈ произведения C × (C ⥤ Type), α : P ⟶ Q и β ∈ (coyonedaPairing C).obj P, отображение pairing удовлетворяет равенству: (coyonedaPairing C).map α β = coyoneda.map α.fst.op ≫ β ≫ α.snd.
LaTeX
$$$$ (coyonedaPairing(C)).map \alpha \beta = coyoneda.map \alpha.fst.op \;\gg\; \beta \;\gg\; \alpha.snd $$$$
Lean4
@[simp]
theorem coyonedaPairing_map (P Q : C × (C ⥤ Type v₁)) (α : P ⟶ Q) (β : (coyonedaPairing C).obj P) :
(coyonedaPairing C).map α β = coyoneda.map α.1.op ≫ β ≫ α.2 :=
rfl