Why do we row reduce? What IS a matrix?
What does the RREF tell us, and why do we spend so much time on it? Why do we define matrix multiplication the way we do?
Introduction to Least Squares Part 2 (Electric Boogaloo)
Why the heck do we multiply by the transpose
The Wonderful World of Projectors
They're cool, I promise!
Constant Coefficient ODEs Made Simple with Linear Operators
No more guessing. Let's make it intuitive with linear algebra.
In Defense of Cramer's Rule
(and determinants)