I found it rather confusing how cyclical groups played into the whole equation. Basically, I just found them to be confusing. In general, the proofs were a little difficult to follow. I think I just lack the understanding from the previous section.
However, I did find it interesting about the ability to raise a to the phi(n). That was something that I was not completely expecting. Overall, it seems that congruence to 1 is rather important.
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