A refresher on matrix multiplication. Because your math classes were years ago. Here's the order I recommend:
- TED-Ed video — How to organize, add and multiply matrices - Bill Shillito (only 5 minutes)
- betterexplained.com — "An Intuitive Guide to Linear Algebra" by Kalid Azad
- mathinsight.org: "Matrices and linear transformations"
- Read some of the answers on math.stackexchange.com. You've been studying the general definition of matrix multiplication. You may wonder: "Are there other ways to define the product of two matrices?" These resources will answer, yes, there are other ways, but also explain why this general definition is the standard way.
- [What is the intuitive way of thinking about multiplication of m