Difficult: Every proof in this section can be followed step by step. But when I finish following the proof, it's hard to get an overall idea of why is works. So can we go through the proof for Thm 2.8 in class and maybe the proofs for Corollaries 2.9 and 2.10? I'd think I just need to go through it again.
Reflective: So I guess that the equations in number 10 from 2.2 were a lot more important than I thought they were. Hmmm. And how do these relate to rings and groups? Guess I'll find out.
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