Quiz 3 covers the understanding of matrices through their eigenvalues. Elimination is history now, because it does NOT preserve eigenvalues. Notice the special types of matrices (like positive definite) and their factorizations.

These video lectures of Professor Gilbert Strang teaching 18.06 were recorded in Fall 1999 and do not correspond precisely to the current edition of the textbook. However, this book is still the best reference for more information on the topics covered in each lecture.

Strang, Gilbert. Introduction to Linear Algebra. 5th ed. Wellesley-Cambridge Press, 2016. ISBN: 9780980232776.

Instructor/speaker: Prof. Gilbert Strang