{A : Type} {x y z : A} (p : z = x) (q : y = z) (r : y = x) : (r = q @ p) <~> (r @ p^ = q) := Build_Equiv _ _ (moveR_pV p q r) _. Global Instance isequiv_moveL_Mp {A : Type} {x y z : A} (p : x = z) (q : y = z) (r : y = x) : IsEquiv (moveL_Mp p q r). Proof. destruct r. apply (isequiv_compose' _ (isequiv_concat_l _ _) _ (isequiv_concat_r _ _)). Defined.
Require Import Basics.Overture Basics.Equivalences Basics.PathGroupoids Basics.Tactics.