Section Fnormalized_Def.
Variable radix : Z.
Hypothesis radixMoreThanOne : (1 < radix)%Z.
Let radixMoreThanZERO := Zlt_1_O _ (Zlt_le_weak _ _ radixMoreThanOne).
Hint Resolve radixMoreThanZERO: zarith.
Let FtoRradix := FtoR radix.
Coercion FtoRradix : float >-> R.
Variable b : Fbound.
Definition Fnormal (p : float) :=
Fbounded b p /\ (Zpos (vNum b) <= Z.abs (radix * Fnum p))%Z.
intros p H; case H; auto.
Qed.
intros p H; case H; auto.
Qed.
Hint Resolve FnormalBounded FnormalBound: float.
unfold is_Fzero in |- *; intros p H; red in |- *; intros H1.
case H; rewrite H1.
replace (Z.abs (radix * 0)) with 0%Z; auto with zarith.
rewrite Zmult_comm; simpl in |- *; auto.
Qed.

Theorem FnormalFop : forall p : float, Fnormal p -> Fnormal (Fopp p).