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Add proofs of functor-laws on delta
author Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
date Fri, 13 Feb 2015 17:13:23 +0900
parents fc44782929a7
children
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return x = eta x
x >>= f  = mu (fmap f x)

eta x = return x
mu  x = (>>= id)