Section C.
Parameter g : forall m : nat, m <> 0 -> Prop.
Parameter f : forall (m : nat) (H : m <> 0), g m H.
Variable n : nat.
Variable ap_n : n <> 0.
Let delta := f n ap_n.
lia.
Qed.
End C.
intros.
lia.
Qed.
intros.
lia.
Qed.

(* Check that the interpretation of mult on nat enforces its positivity *)
(* Submitted by Hubert Thierry (BZ#743) *)
(* Postponed... problem with goals of the form "(n*m=0)%nat -> (n*m=0)%Z" *)
Lemma lem10 : forall n m : nat, le n (plus n (mult n m)).