English
Let F: V ⥤q W be a Prefunctor between quivers. Then the path construction is compatible with the free quiver functor: the composition Paths.of V with (Cat.freeMap F).toPrefunctor equals the composition F with Paths.of W.
Русский
Пусть F : V ⥤q W — префунктор между кварьерами. Тогда построение путей совместимо с свободной реконструкцией квар: композиция Paths.of V с (Cat.freeMap F).toPrefunctor равна композиции F с Paths.of W.
LaTeX
$$$Paths.of V \;⋙q\; (Cat.freeMap F).toPrefunctor = F \;⋙q\; Paths.of W$$$
Lean4
/-- Naturality of `Paths.of`, which defines a natural transformation
` 𝟭 _⟶ Cat.free ⋙ Quiv.forget`. -/
theorem pathsOf_freeMap_toPrefunctor {V : Type u} {W : Type u₁} [Quiver.{v + 1} V] [Quiver.{v₁ + 1} W] (F : V ⥤q W) :
Paths.of V ⋙q (Cat.freeMap F).toPrefunctor = F ⋙q Paths.of W :=
rfl