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view paper/src/agda-pattern.agda @ 19:046b2b20d6c7 default tip

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fix
author ryokka
date Mon, 09 Mar 2020 11:25:49 +0900
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_-_ : Nat → Nat → Nat
n     - zero = n
zero  - suc m = zero
suc n - suc m = n - m