proposition: Lemma NToWord_wordToN {sz} : forall (w: word sz), NToWord _ (wordToN w) = w.
proof: Proof. intros; rewrite NToWord_nat, wordToN_nat, Nat2N.id, natToWord_wordToNat; reflexivity. Qed.
imports: Fiat.Common.Coq__8_4__8_5__Compat List Bedrock.Word Coq.ZArith.ZArith Coq.micromega.Psatz NArith NArithRing