# Talk:One Equals Minus One

Jump to navigation
Jump to search

I'm a bit confused by explanation 1. The symbol $\sqrt \cdot$ means the principal square root only, doesn't it? Or is that the whole point, that the paradox arises from not giving the symbol a consistent meaning? --GFauxPas 14:35, 30 November 2011 (CST)

- I had the misfortune of attending a mathematics class where $\sqrt \cdot$ was interpreted as
**only ever**being the positive square root. I pointed out that in fact there was positive and negative (*everybody*knows that) and the teacher told me to shut up because I was confusing my co-students, and loudly and emphatically declaimed that $\sqrt \cdot$**only ever**means the positive square root. (It was an elementary course which I had to attend in order to get my units for my degree.) - But I've watched the explanation now. I'll rewrite it. --prime mover 15:05, 30 November 2011 (CST)