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view paper/src/ThreePlusOne.agda @ 55:70bea06ebdf3
Add reasoning
author | atton <atton@cr.ie.u-ryukyu.ac.jp> |
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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