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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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data _×_ (A B : Set) : Set where
  <_,_> : A -> B -> A × B

fst : {A B : Set} -> A × B -> A
fst < a , _ > = a

snd : {A B : Set} -> A × B -> B
snd < _ , b > = b