unfold FNodd, FNeven, FNSucc in |- *.
intros p H' H'0.
rewrite FcanonicFnormalizeEq; auto with float arith.
apply FoddSuc; auto with float arith.
Qed.

Theorem FNevenSuc :
forall p : float,
Fbounded b p -> FNeven p -> FNodd (FNSucc b radix precision p).