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Actually, they're _not_ both equal to infinity, in the mathematical sense (which I believe you're discussing) -- X / 0 is undefined. What's equal to infinity i
by blinks 15y ago
Actually, they're _not_ both equal to infinity, in the mathematical sense (which I believe you're discussing) -- X / 0 is undefined.
What's equal to infinity is the limit of 1 / x as x approaches 0, and that's only from the positive side. From the negative side, it's -infinity.
- cdavid 15y agoNobody is discussing about usual mathematical definitions: this is about the IEEE754 standard. In that context, x / 0 is defined (to positive infinity). I was pointing the error of the OP about the explanation about Nan != Nan.