proposition: Lemma not_le_1_0 : ~(1 ≤ 0).
proof: Proof. apply lt_not_le_flip, lt_0_1. 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