## Deep (learning) like Jacques Cousteau - Part 7 - Matrices

(TL;DR: matrices are rectangular arrays of numbers.)

(TL;DR: matrices are rectangular arrays of numbers.)

(TL;DR: Start with two vectors with equal numbers of elements. Multiply them element-wise. Sum the results. This is the dot product.)

(TL;DR: You can add vectors that have similar dimensions.)

(TL;DR: Multiply a vector by a scalar one element at a time.)

(TL;DR: Vectors are ordered lists of numbers.)

(TL;DR: Scalars are single numbers.)

(TL;DR: I’m going to go deep into deep learning. Sets are collections of things.)