This should appear in the middle of page 4. An isomorphism is a linear transformation that is both injective and surjective. Also, I never actually techincally defined what an isomorphism is. In particular, in the statement of the Theorem on the bottom of page 3, I left out the word "injective". (Panopto file now on Brightspace) Okay, after posting, I noticed a couple of serious mistakes in these notes (I talk about them in the Panopto file on Brightspace). Check out the audio version on Brightspace if you can't make out what things say. (Panopto file now on Brightspace) Sorry, the top half of the first page is a little blurry, but I think the rest is okay. On the brightspace page I'm posting the notes with the audio, but here just the notes. IMPORTANT: I'm posting pdf copies of the lecture notes here, starting with Section 3.4. If you can't make my office hours, let me know and we can try to.Email is (which is the best way to get a hold of.Math 312: Linear Algebra, Spring 2020 Math 312: Linear Algebra, Spring 2020
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