fact: Definition transport_equiv {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)).
imports: HoTT.Basics Types.Sigma Types.Forall Types.Arrow Types.Paths