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From: Simon Wright <simon@pushface.org>
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Subject: Re: S'Is_nan or S'Is_inf?
Date: Sat, 17 Jul 2010 07:24:52 +0100
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Warren <ve3wwg@gmail.com> writes:

> To detect NaN then, this seems to work:

See above, where Jean-Pierre said

> If X /= X, then X is a NaN (see http://en.wikipedia.org/wiki/NaN)