∀ {X : Type u} {Y : Type v} [inst : TopologicalSpace X] [inst_1 : TopologicalSpace Y] {x₀ x₁ : X} {p q : Path x₀ x₁}
  (F : p.Homotopy q) (f : C(X, Y)) (a : ↑unitInterval × ↑unitInterval), (F.map f) a = (⇑f ∘ ⇑F) a