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December 4, 2021 19:22
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Eckmann Hilton With K
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{-# OPTIONS --with-K #-} | |
module EckmannHiltonWithK where | |
open import Agda.Primitive | |
data _≡_ {ℓ : Level} {A : Set ℓ} : A → A → Set ℓ where | |
refl : {a : A } → a ≡ a | |
Ω : (A : Set₀) (a : A) → Set₀ | |
Ω A a = a ≡ a | |
_⊙_ : {A : Set₀} {a : A} → Ω A a → Ω A a → Ω A a | |
refl ⊙ refl = refl | |
Ω² : (A : Set₀) (a : A) → Set₀ | |
Ω² A a = Ω (a ≡ a) (refl {lzero} {A} {a}) | |
_⨀_ : {A : Set₀} {a : A} → Ω² A a → Ω² A a → Ω² A a | |
refl ⨀ refl = refl | |
Eckmann-Hilton : {A : Set₀} {a : A} (α : Ω² A a) (β : Ω² A a) | |
→ (α ⨀ β) ≡ (β ⨀ α) | |
Eckmann-Hilton refl refl = refl |
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