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view final_pre/src/AgdaProduct.agda @ 7:28f900230c26

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author ryokka
date Mon, 19 Feb 2018 23:32:24 +0900
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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