I'm a Professor of Mathematics at Indiana University, Bloomington—since 1983. I got my PhD in June of 1982 at Princeton.
Though my research publications are in geomety—not algebra—I've had a fascination with linear algebra since my undergrad days at UCLA, and a passion for teaching it. After using many other texts over the years, my own slowly evolved. I like to emphasize the geometric aspects of the subject and its beautiful dualities. I skip abstract vector spaces and applications to devote extra time to the subspaces of euclidean space, which are more concrete, and to the structure of linear transformations, which play a key role throughout mathematics. I see my book as a "liberal arts/pure math" approach to the subject, as opposed to an engineering/applied math approach.