Difficult: This section was really abstract. The proof of Theorem 7.52 was especially hard for me to follow, and it would be helpful for me to go over the proof in class. I think it would make more sense if we went through the proof a little bit slower. It was confusing to me that the authors used both letters and numbers without much explanation.
Reflective: The fact that all alternating groups except when n = 4 are simple is quite interesting. I would think that it would be extremely helpful in classifying all of the groups. Using this fact, how did mathematicians classify all the groups?
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