Hi, so im currently taking LA + Diff. eqtns in one class right now. Im planning to take QM in the summer. So im wondering, how much of LA is needed for QM? My reason for askign this is that there are so many theorems and properties of matricis that i honestly can't master all of them, and i have difficulty understanding the proofs of many theorems. I'm wondering how much QM uses LA? What are the topics that i need to have down solidly? Also, are DE important in QM?