**NOTE: THIS DOCUMENT IS OBSOLETE, PLEASE CHECK THE NEW
VERSION:** "Mathematics of the Discrete
Fourier Transform (DFT), with Audio Applications --- Second
Edition", by Julius
O. Smith III, W3K
Publishing, 2007, ISBN 978-0-9745607-4-8. - Copyright ©
*2017-09-28* by Julius O. Smith III -
Center for Computer Research
in Music and Acoustics (CCRMA), Stanford University

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## Introduction to Complex Numbers

This chapter provides an introduction to complex numbers, factoring polynomials, the quadratic formula, the complex plane, Euler’s formula, and an overview of numerical facilities for complex numbersin Matlab and Mathematica.

Subsections