proposition: Lemma lt_2_3 : 2 < 3.
proof: Proof. apply (strictly_order_preserving (1+)), lt_1_2. Qed.
imports: Coq.setoid_ring.Ring MathClasses.interfaces.abstract_algebra MathClasses.interfaces.orders MathClasses.theory.rings MathClasses.orders.orders MathClasses.orders.maps