Did you miss the first sentence in the post? > If, like me, you struggled to understand the Fourier Transformation when you first learned about it No where do

Did you miss the first sentence in the post? > If, like me, you struggled to understand the Fourier Transformation when you first learned about it No where does the author imply that he is teaching the Fourier Transform to someone who has never heard of it. I agree with your overall point. Blog posts are not going to teach you difficult mathematics unless they are the length of college textbooks. But a blog post like this is great for reinforcement. If, like me, you are an ECE (Electrical and Computer Engineer) who has written software for the last 15 years, an explanation like the one in the post makes a lot of neurons reconnect.