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>>>But it's not the same number anymore. It's lost something of its essence, like identity... En, I don't recognize you... Who are you and what have you done with en?
>>
>>You've lost me
>
>If something "turns a negative number into positive" (see first message in the thread), it's not the same number anymore.
>
>A function which would return a positive number of same magnitude as the (possibly negative) argument is fine, it may return a different number.
>
>Just a mathematician's peeve - you can't change the value of a number. You can change the value of a variable, you can have a function which would return anything, but even it can't change a number. A number is a constant.
You two are both math savants so maybe one of you can explain something to me. It is i, the square root of negative 1. Dumbo me finally asked a professor about it. I said the square of anything is a positive. He said that's true in theory but i makes possible many theorems. That was when I knew I had no trajectory in advanced mathematics.
Tamar, are you there? You have a PhD in math. Maybe you can explain it to me in terms a layman can understand.
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