[Haskell-cafe] Finding the Convex Hull (Problem 12 of Real World Haskell)

[Rob Crowther]

I wrote a "solution" to this problem, but it appears to return incorrect
results. There's a pastebin of the code at
http://hpaste.org/fastcgi/hpaste.fcgi/view?id=2121 and a picture of the
inputs, outputs, and expected results graphed at
http://img510.imageshack.us/img510/9971/resultsg.jpg

I'm wondering if this is a flaw in my code, my understanding of the problem,
or both. Any ideas on how to track this one down would be very much
appreciated.

Thank you!

-- 
ヽ(^o^)ノ  -rob
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