Created
November 8, 2016 16:17
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Modular multiplicative inverse in Haskell
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| -- Inverses a modulo b | |
| inverse b a = | |
| let | |
| next a b = zipWith (-) a $ map (*(head $ zipWith div a b)) b | |
| l = [a,0] : [b,1] : zipWith next l (tail l) | |
| in | |
| head $ tail $ head $ filter ((==1).head) l |
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