intros n m p H H1;
red; apply Rmult_lt_compat_l_rev with p; auto with real.
Qed.

(* Specifications: *)
Theorem Rmult_gt_neg_compat_l_rev:
forall n m p : R, (0 > p)%R -> (p * n > p * m)%R -> (m > n)%R.
Theorem Rmult_gt_neg_compat_l_rev:
forall n m p : R, (0 > p)%R -> (p * n > p * m)%R -> (m > n)%R.