Lez 8 - Part 1 (Sigmoid Derivative) by SEPASEH HAKIMINEJAD - Wednesday, 30 November 2022, 12:58 AM Number of replies: 0 Here there is the proof:https://hausetutorials.netlify.app/posts/2019-12-01-neural-networks-deriving-the-sigmoid-derivative/#:~:text=The%20derivative%20of%20the%20sigmoid%20function%20%CF%83(x)%20is%20the,1%E2%88%92%CF%83(x). Permalink Reply