view paper/src/ThreePlusOne.agda @ 55:70bea06ebdf3

Add reasoning
author atton <atton@cr.ie.u-ryukyu.ac.jp>
date Tue, 31 Jan 2017 17:30:07 +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