Definition CReal_abs (x : CReal) : CReal :=
{|
  seq := CReal_abs_seq x;
  scale := CReal_abs_scale x;
  cauchy := CReal_abs_cauchy x;
  bound := CReal_abs_bound x
|}.

Lemma CRealLe_0R_to_single_dist : forall (x : CReal) (n : Z), 0 <= x -> (-(2^n) <= seq x n)%Q.