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fix
author soto@cr.ie.u-ryukyu.ac.jp
date Tue, 15 Sep 2020 07:06:29 +0900
parents 73127e0ab57c
children
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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