English
The lastFun of a product map equals the product map of the lastFuns.
Русский
Последняя функция произведения равна произведению последних функций.
LaTeX
$$\operatorname{lastFun}(f \otimes' f') = \operatorname{Prod.map}(\operatorname{lastFun} f)(\operatorname{lastFun} f')$$
Lean4
@[simp]
theorem lastFun_prod {α α' β β' : TypeVec (n + 1)} (f : α ⟹ β) (f' : α' ⟹ β') :
lastFun (f ⊗' f') = Prod.map (lastFun f) (lastFun f') :=
rfl