RR is not the real numbers, its just a pretty useful approximation for a 
variety of tasks.


On Friday, October 17, 2014 8:28:51 AM UTC+1, Jeroen Demeyer wrote:
>
> On 2014-10-16 22:55, kcrisman wrote: 
> > See http://stackoverflow.com/questions/26409854/ My sense is that NaN 
> > isn't real, but maybe it is in an IEEE framework? 
>
> NaN is Not A Number, so surely Not A RealNumber either. 
>
> The fact that the Sage parent happens to be RR is not really relevant. 
>

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