proposition: Lemma not_le_2_0 : ~(2 ≤ 0).
proof: Proof. apply lt_not_le_flip, lt_0_2. Qed.
imports: HoTT.Classes.theory.apartness HoTT.Classes.interfaces.abstract_algebra HoTT.Classes.interfaces.orders HoTT.Classes.theory.rings HoTT.Classes.orders.orders HoTT.Classes.orders.maps