End Fcore_digits.
(** Specialized version for computing the number of bits of an integer *)
Section Zdigits2.

(* Specifications: *)
Theorem Z_of_nat_S_digits2_Pnat :
forall m : positive,
Z_of_nat (S (digits2_Pnat m)) = Zdigits radix2 (Zpos m).
Theorem Z_of_nat_S_digits2_Pnat :
forall m : positive,
Z_of_nat (S (digits2_Pnat m)) = Zdigits radix2 (Zpos m).