diff --git a/src/plfa/part1/Quantifiers.lagda.md b/src/plfa/part1/Quantifiers.lagda.md index dd160e0c..7d4ccfc0 100644 --- a/src/plfa/part1/Quantifiers.lagda.md +++ b/src/plfa/part1/Quantifiers.lagda.md @@ -20,7 +20,7 @@ open Eq using (_≡_; refl) open import Data.Nat using (ℕ; zero; suc; _+_; _*_) open import Relation.Nullary using (¬_) open import Data.Product using (_×_; proj₁; proj₂) renaming (_,_ to ⟨_,_⟩) -open import Data.Sum using (_⊎_) +open import Data.Sum using (_⊎_; inj₁; inj₂) open import plfa.part1.Isomorphism using (_≃_; extensionality) ```