The introduction to convolution via signals and systems is definitely simpler. You can basically introduce the Dirac delta (impulse), introduce the idea of the

The introduction to convolution via signals and systems is definitely simpler. You can basically introduce the Dirac delta (impulse), introduce the idea of the impulse response, and then point out that every function is just a series of impulses scaled by the function value. Then convolution is just the sum of the impulse responses. (This description is probably leaving mathematicians quietly screaming, but it's just a short skip from that understanding to a more formal one.) I found the article a bit roundabout. Perhaps I'm not part of the intended audience; I understand convolutions, but have only limited familiarity with the internals of neural networks.