{A : Type} {B C : A -> Type} {x1 x2 : A} (p : x1 = x2) (f : B x1 -> C x1) (y : B x2) : (transport (fun x => B x -> C x) p f) y = p # (f (p^ # y)). Proof. destruct p; simpl; auto. Defined.
Require Import Basics.Overture Basics.PathGroupoids Basics.Decidable Require Import Types.Forall.