Definition Nopp := (@SRopp N).

(* Specifications: *)
Lemma Neqe : ring_eq_ext N.add N.mul Nopp (@eq N).
Proof (SReqe_Reqe Nseqe).
Lemma Nath :
almost_ring_theory 0%N 1%N N.add N.mul Nsub Nopp (@eq N).