[Haskell-cafe] Re: Why does the class called "Real" support only
rationals, and not all reals?
polyomino at f2s.com
Mon Jun 4 04:07:20 EDT 2007
Yes, I'm afraid that you are understanding correctly. Annoying isn't it.
It is well-known (among Haskell mathematicians at least) that the numeric type
classes in the prelude are broken.
Here's one proposal for a small step in the right direction:
But it really needs a mathematician to sit down and sort it out properly.
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