# Category:Definitions/Complex Numbers

This category contains definitions related to Complex Numbers.
Related results can be found in Category:Complex Numbers.

A complex number is a number in the form $a + b i$ or $a + i b$ where:

$a$ and $b$ are real numbers
$i$ is a square root of $-1$, that is, $i = \sqrt {-1}$.

## Subcategories

This category has the following 13 subcategories, out of 13 total.