Readin' Artin's "Algebra", section 1.1, starring my cat | Readin' Episode 1

First in a new series where I will just read out of a textbook, providing commentary along the way. In this episode I'm reading section 1.1 of Michael Artin's book "Algebra". It's a classic book on abstract algebra, which is the language of pure mathematics.

Chapter 1 is a review of linear algebra. Section 1.1 is a self-contained-ish recap of the basics of matrix algebra

Book: https://www.amazon.com/Algebra-Classic-Classics-Advanced-Mathematics/dp/0134689607/