proposition: Lemma le_1_4 : 1 ≤ 4.
proof: Proof. apply nonneg_plus_le_compat_r, le_0_3. 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