Section Twist_Prod_Func_Twist.
Context {C C' : Category} (F : C –≻ C') {D D' : Category} (G : D –≻ D').

Theorem Twist_Prod_Func_Twist :
(((Twist_Func _ _) ∘ (Prod_Functor F G)) ∘ (Twist_Func _ _))%functor =
Prod_Functor G F.