view paper/src/NatAdd.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 nat
module nat_add where
 
_+_ : Nat -> Nat -> Nat
O + m     = m
(S n) + m = S (n + m)