Open Scope Z_scope.
(* Pierre L: examples gathered while debugging romega. *)
(* Starting from Coq 8.9 (late 2018), `romega` tactics are deprecated. The tests in this file remain but now call the `lia` tactic. *)
(* Magaud BZ#240 *)

Lemma test_lia_8 : forall x y:Z, x*x<y*y-> ~ y*y <= x*x.