UCC2014/FinalExams — pull request #3 by Harkin (2014-04-10 19:19:46+00:00)
Title: fixes

added an alternative isPermutation. I think yours has a bug somewhere,
isPermutation (\x -> (x+1) `mod` 5) [0,1,2,3,4]
returns false

Changed inverse, still not sure what it's meant to do.