ReLU

http://karpathy.github.io/neuralnets/

http://karpathy.github.io/neuralnets/

A Step by Step Backpropagation Example

https://datascience.stackexchange.com/questions/19272/deep-neural-network-backpropogation-with-relu

https://stackoverflow.com/questions/32546020/neural-network-backpropagation-with-relu

A Gentle Introduction to the Rectified Linear Unit (ReLU)

https://towardsdatascience.com/activation-functions-neural-networks-1cbd9f8d91d6

https://towardsdatascience.com/activation-functions-neural-networks-1cbd9f8d91d6