proposition: Theorem lognat_prod_sum_gen : forall (a b: nat)(pf1 : (a <> 0))(pf2 : (b <> 0))(pf3 : a * b <> 0), lognat pf1 + lognat pf2 <= lognat pf3.
proof: Proof. intros. eapply lognat_prod_sum_gen_h. eauto. Qed.
imports: ZArith micromega.Lia