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-rw-r--r--Functor/Monoidal/Instance/Nat/Preimage.agda4
1 files changed, 2 insertions, 2 deletions
diff --git a/Functor/Monoidal/Instance/Nat/Preimage.agda b/Functor/Monoidal/Instance/Nat/Preimage.agda
index 59c9391..844df79 100644
--- a/Functor/Monoidal/Instance/Nat/Preimage.agda
+++ b/Functor/Monoidal/Instance/Nat/Preimage.agda
@@ -4,7 +4,7 @@ module Functor.Monoidal.Instance.Nat.Preimage where
open import Category.Monoidal.Instance.Nat using (Natop,+,0; Natop-Cartesian)
open import Categories.Category.Instance.Nat using (Nat-Cocartesian)
-open import Categories.Category.Instance.SingletonSet using (SingletonSetoid)
+open import Data.Setoid.Unit using (⊤ₛ)
open import Categories.NaturalTransformation using (NaturalTransformation; ntHelper)
open import Categories.Category.Monoidal.Instance.Setoids using (Setoids-Cartesian)
open import Categories.Category.BinaryProducts using (module BinaryProducts)
@@ -38,7 +38,7 @@ open import Relation.Binary.PropositionalEquality as ≡ using (_≡_; _≗_; mo
open import Data.Bool.Base using (Bool)
open Func
-Preimage-ε : SingletonSetoid {0ℓ} {0ℓ} ⟶ₛ Subsetₛ 0
+Preimage-ε : ⊤ₛ {0ℓ} {0ℓ} ⟶ₛ Subsetₛ 0
to Preimage-ε x = []
cong Preimage-ε x ()