"i" is the square root of negative 1, which can't exist. It stands for "imaginary."
No one actually knows if pi is a rational number (can be expressed as a fraction) or not, since it's never been calculated all the way out, so for all intents and purposes it's irrational.
![[personal profile]](https://www.dreamwidth.org/img/silk/identity/user.png)
ninetydegrees
no subject
on 2008-05-08 03:27 pm (UTC)No one actually knows if pi is a rational number (can be expressed as a fraction) or not, since it's never been calculated all the way out, so for all intents and purposes it's irrational.