Inductive R_nat_lt : nat -> nat -> Prop :=
| R_lt : forall n m, n < m -> R_nat_lt n m.Inductive R_nat_lt : nat -> nat -> Prop :=
| R_lt : forall n m, n < m -> R_nat_lt n m.

(* Specifications: *)
Theorem wf_R_lt : well_founded R_nat_lt.