proposition: Lemma cut_minus_plus_rev_r x y z : y ∸ z = (y + x) ∸ (z + x).
proof: Proof. rewrite !(commutativity _ x). now apply cut_minus_plus_rev_l. Qed.
imports: Coq.setoid_ring.Ring MathClasses.interfaces.abstract_algebra MathClasses.interfaces.additional_operations MathClasses.interfaces.orders MathClasses.orders.minmax