Re: [Haskell-cafe] Re: 0/0 > 1 == False

On 14 Jan 2008, at 9:56 AM, David Roundy wrote:

On Fri, Jan 11, 2008 at 07:10:20PM -0800, Jonathan Cast wrote:

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On 11 Jan 2008, at 10:12 AM, Achim Schneider wrote:

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David Roundy wrote:

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Prelude> let x=1e-300/1e300 Prelude> x 0.0 Prelude> x/x NaN

The "true" answer here is that x/x == 1.0 (not 0 or +Infinity), but there's no way for the computer to know this, so it's NaN.

Ah. My apologies. Must remember to read first, then flame... You are right that, in Ratio Integer, you get this result. But you can't get that answer in Double. jcc