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Require Import Coq.ZArith.ZArith.
Require Import Coq.micromega.Lia.
Require Import Crypto.Util.ZUtil.Hints.Core.
Require Import Crypto.Util.ZUtil.ZSimplify.Core.
Local Open Scope Z_scope.
Module Z.
Lemma opp_eq_0_iff a : -a = 0 <-> a = 0.
Proof. omega. Qed.
Hint Rewrite opp_eq_0_iff : zsimplify.
End Z.
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