proposition: Theorem eqrZTrans : transitive rZ eqRz.
proof: Proof. red in |- *; auto with stalmarck. unfold eqRz in |- *; intros x y z H'; rewrite H'; auto with stalmarck. Qed.
imports: Stalmarck(sTactic) Coq(Relation_Definitions) Coq(ZArith) Coq(Inverse_Image) Coq(Inclusion) Coq(Wf_nat) Coq(List)