view final_pre/src/ThreePlusOne.agda @ 7:28f900230c26

add final_pre
author ryokka
date Mon, 19 Feb 2018 23:32:24 +0900
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open import Relation.Binary.PropositionalEquality
open import nat
open import nat_add

module three_plus_one where

3+1 : (S (S (S O)))  +  (S O) ≡ (S (S (S (S O))))
3+1 = refl