nan question

[Nathan Reed]

bobef wrote:
> Janice Caron Wrote:
> 
>> On 9/25/07, bobef <bobef at abv_nospam.bg> wrote:
>>> something is totally wrong. Just look at this. "!<>="
>> Well consider, the imaginary number i is not less than one. It is also
>> not greater than one. It is also not equal to one. It makes perfect
>> sense.
> 
> I can't imagine such number, sorry :) But let aside my imagination. I don't know what imaginary number is, so I am not commenting if it makes sense. All I'm saying it that it is nonsense that if(double.nan!=double.nan) returns false (IMHO).

I'm assuming you meant to say that it makes no sense if double.nan == 
double.nan returns false?  But if NaNs compared equal to each other, 
then this:

sqrt(-1) == acos(2)

would be true, since both return a NaN.  I bet you don't really want that.

Thanks,
Nathan Reed