Difference between revisions of "Imaginary number"
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Revision as of 15:55, 5 September 2008
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 
is imaginary if and only if 
, where 
is the imaginary unit and 
is the imaginary part function.
See Also
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