Deep Learning Matrix Calculus Made Easy!

Detailed explanation of deep learning neural network matrix calculus, with a single index notation! (just the layer indication). Includes the derivation of the famous back progagation algorithm. An application example at the end shows a fully working solution. These equations really do work! Article describing the derivation can be found here: https://www.linkedin.com/pulse/deep-learning-matrix-calculus-made-easy-mark-massel