1. FFT Etc.

FFT Etc.

Complex number

Phasor

Quaternion

Imaginary unit

Imaginary number

Complex plane

Polar coordinate system

Argument (complex analysis)

Angle notation

Euler's formula

Taylor series

De Moivre's formula

Complex analysis

Complex-valued function

Euler's identity

Time domain

Frequency domain

Pole (complex analysis)

Zero (complex analysis)

Fourier transform

Fourier analysis

Angular frequency

Real number

Mathematics

Polynomial

Physics

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