Definition Fulp (p : float) :=
  powerRZ radix (Fexp (Fnormalize radix b precision p)).

Theorem isMinComp : forall (r1 r2 : R) (min max : float), isMin b radix r1 min -> isMax b radix r1 max -> (min < r2)%R -> (r2 < max)%R -> isMin b radix r2 min.