Edit: “(a40-y’)” should read “(a40-y)”, without the prime symbol above the y.
Animation depicting the intuitive meaning behind the partial derivative of a cost function with respect to a weight in the neural network. (No idea why this video was private ever since a year ago when I posted it XD)
Apologize in advance for script / font, I did not know LaTeX back then...
![](https://s2.save4k.ru/pic/WIaakSkFGbo/mqdefault.jpg)