{A B : Type} {C : A -> B -> Type} {x1 x2 : A} (p : x1 = x2) (f : forall y : B, C x1 y) : (transport (fun x => forall y : B, C x y) p f) == (fun y => transport (fun x => C x y) p (f y)) := match p with idpath => fun _ => 1 end.
Require Import Basics.Overture Basics.Equivalences Basics.PathGroupoids