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non-forgetful attribute for pttdom_elabel #23

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non-forgetful attribute for pttdom_elabel #23

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1 change: 1 addition & 0 deletions theories/pttdom.v
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Expand Up @@ -205,6 +205,7 @@ Section derived.
Lemma eqv11 x y z: eqv' x y -> eqv' y z -> x ≡ z.
Proof. move=> /= -> ->. apply cnvI. Qed.

#[non_forgetful_inheritance]
HB.instance Definition pttdom_elabel :=
Elabel_of_Setoid.Build X eqv'_sym eqv01 eqv11.

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