Difficult: I was doing pretty good with the first part of this section, and then I started getting confused by the theorems. For example, theorem 8.1. I did not understand what this means at all. Also, lemma 8.2 was confusing to me as well. I didn't understand how this holds true. I might still be confused by normal subgroups and how they apply in proofs. I am trying to figure our how to follow the proof of 8.1, but I just don't understand all the subscripts and notation. I also don't get how to find what MxN is isomorphic to like the 2nd example of the section.
Connections: I recognize seeing the cartesian products in other sections of this text. I understand what to do with them and how to find the cartesian products, so using them in proofs should be pretty easy for me, but like I said above some of the notation is getting a little confusing for me. I feel like the cartesian products are pretty computational and are easy to work with and to find the elements of a cartesian product.
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