3.1 part 2, due January 21

1. Difficult: It was actually difficult to find something difficult this time. Our lecture yesterday (1/19) really cleared up a lot of my questions. I guess the biggest thing I didn't understand this time is the difference between a subring and a subfield. The book didn't really clarify that. Also, when we say r & r', and s and s' Is r' and s' related to r and s? Or are they any other number? That's really confusing me too.



2. Reflective: I'm glad that the rules of cartesian products are the same. I don't know if I could handle another thing that was just slightly different.