Imaginary number

Revision as of 14:35, 11 July 2007 by JBL (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

An imaginary number is a complex number whose real part is equal to 0. In the complex plane, these numbers lie on the imaginary axis. They are sometimes also refered to as pure imaginary numbers,

The complex number $z$ is imaginary if and only if $z = i \textrm{Im}(z)$, where $i = \sqrt{-1}$ is the imaginary unit and $\textrm{Im}$ is the imaginary part function.

See Also

This article is a stub. Help us out by expanding it.