Mercurial > hg > Papers > 2020 > soto-midterm
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author | soto@cr.ie.u-ryukyu.ac.jp |
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date | Tue, 08 Sep 2020 18:38:08 +0900 |
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_==Nat_ : Nat -> Nat -> Bool zero ==Nat zero = true (suc n) ==Nat zero = false zero ==Nat (suc m) = false (suc n) ==Nat (suc m) = n ==Nat m instance natHas== : Eq Nat natHas== = record { _==_ = _==Nat_}