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view src/modus_ponens.txt @ 24:13affa3e65a2

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Add curry-howad isomorphism
author Yasutaka Higa <e115763@ie.u-ryukyu.ac.jp>
date Tue, 10 Feb 2015 11:38:36 +0900
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*Main> :type fst
fst :: (a, b) -> a
*Main> :type snd
snd :: (a, b) -> b

*Main> :type \cond -> (\a -> (snd cond ((fst cond) a)))
\cond -> (\a -> (snd cond ((fst cond) a)))
  :: (t2 -> t1, t1 -> t) -> t2 -> t