# Fourier...? An introduction

After reading this article, you should have an overview of the **Fourier-Transform** and the algorithm of the **Fast-Fourier-Transform**.
The main focus is that no assumptions are made, but that an understanding is built on the foundation of school physics/mathematics.

It is important for you to think about the content yourself and learn *actively* by using your intuition to understand the content.
Because of this there will be small questions to think about, which look like this:

What is $\sin(0)$?

It is ok, if you can't answer some questions, but you should always try to fully understand the correct answer.

## Notes

Additionally at times there will be some notes:

These notes reference more in-depth material for further reading, but they are not essential for understanding the article.

## Appendix

The contents in the appendix are also recommended.
They are essential for understanding some of the article.
Especially the parts about **complex numbers** and **complex exponentials** are very recommended.