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(*         *   The Coq Proof Assistant / The Coq Development Team       *)
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Local Open Scope Z_scope.
(** Factorization lemmas *)
(** Other specific variants of theorems dedicated for the Omega tactic *)

Lemma OMEGA19 x : Zne x 0 -> 0 <= x + -1 \/ 0 <= x * -1 + -1.