proposition: Theorem rZltNotRefl : forall a : rZ, ~ rZlt a a.
proof: Proof. intros a; unfold rZlt in |- *; auto with stalmarck. Qed.
imports: Stalmarck(sTactic) Coq(Relation_Definitions) Coq(ZArith) Coq(Inverse_Image) Coq(Inclusion) Coq(Wf_nat) Coq(List)