# Imaginary Number Notation

The letter is used in mathematics to represent the square root of negative one. The number is often referred to as “imaginary”, but here at wumbo we the term “complex”.

Complex Number | Concept

A complex number is an extension of the real number line where in addition to the "real" part of the number there is a complex part of the number. The properties of complex numbers are useful in applied physics as they elegantly describe rotation.