2.1, due on January 10

1. (Difficult) "What was the most difficult part of the material for you?"
The most difficult part of the reading was understanding the corollary about how [a] and [b] of the same mod can either be disjoint or equal and nothing else. I do not believe the proof and how it works; it does not convince me.

2. (Reflective) Write something reflective about the reading. This could be the answer to the question "What was the most interesting part of the material?" or "How does this material connect to something else you have learned in mathematics?" or "How is this material useful/relevant to your intellectual or career interests?" or something else.
The mods connect to what I learned in Math 300 and Math 290. It also relates to change of bases; the process is used the same way.