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Writing agda description
author atton <atton@cr.ie.u-ryukyu.ac.jp>
date Tue, 31 Jan 2017 16:41:36 +0900
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elem : {A : Set} {{eqA : Eq A}} → A → List A → Bool
elem {{eqA}} x (y ∷ xs) = (Eq._==_ eqA x y) || (elem {{eqA}} x xs)
elem         x []        = false