proposition: Lemma of_to (n:N) : N.of_hex_int (N.to_hex_int n) = Some n.
proof: Proof. unfold N.to_hex_int, N.of_hex_int, norm. f_equal. rewrite Unsigned.of_uint_norm. apply Unsigned.of_to. Qed.
imports: Hexadecimal HexadecimalFacts HexadecimalPos PArith NArith