(* Contribution to the Coq Library   V6.3 (July 1999)                    *)
Section Lemmas_on_partial_orders.
Variable U : Type.
Variable B : Ensemble U.
Variable D : PO U.

Theorem Rel_of_antisymmetric : Antisymmetric U (Rel_of U D).
Hint Resolve Rel_of_antisymmetric.