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DONE
author soto <soto@cr.ie.u-ryukyu.ac.jp>
date Sat, 08 Jan 2022 12:41:39 +0900
parents c59202657321
children
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open import nat
module nat_add where
 
_+_ : Nat -> Nat -> Nat
O + m     = m
(S n) + m = S (n + m)