Manu Radhakrishna thinks this is interesting: It is important to understand that we can only multiply two matrices if the number of rows in A is equal to the number of columns in B. From Linear algebra review from Deep Learning with PyTorch Quick Start Guide by David Julian Publisher: Packt Publishing Released: December 2018 Note This should read "It is important to understand that can only multiple two matrixes if the number of columns in A is equal to the number of rows in B." Share this highlight http://learning.oreilly.com/a/deep-learning-with/21442809/ Twitter Facebook Google Plus Email Get Instant Access Now Start a Free Trial Have an account? Sign in.