intros P p r H' H'0 H'1; case (Rle_or_lt 0 r); intros H'2.
repeat rewrite Rabs_right; auto with real.
apply roundedModeLessMult with (P := P); auto.
rewrite <- (Rabs_right r); auto with real.
apply Rle_ge; apply (RleRoundedR0 P) with (r := r); auto.
repeat rewrite Faux.Rabsolu_left1; auto.
replace (radix * - r)%R with (- (radix * r))%R;
[ apply Ropp_le_contravar | ring ].
apply roundedModeMoreMult with (P := P); auto.
rewrite <- (Ropp_involutive r); rewrite <- (Faux.Rabsolu_left1 r); auto.
replace (Float (- 1%nat) (- dExp b)) with (Fopp (Float 1%nat (- dExp b))).
unfold FtoRradix in |- *; rewrite Fopp_correct; auto with real.
simpl in |- *; auto.
apply Rlt_le; auto.
apply Rlt_le; auto.
apply (RleRoundedLessR0 P) with (r := r); auto.
apply Rlt_le; auto.
Qed.

Theorem RleBoundRoundl :
forall P,
RoundedModeP b radix P ->
forall (p q : float) (r : R),
Fbounded b p -> (p <= r)%R -> P r q -> (p <= q)%R.