4.3-4.4, due on January 27

1. I'm a little bit worried about doing proofs with real numbers, because it looks like we will be using a lot of inequalities, and those always confused me when I was in algebra. The same thing goes for absolute values. I never remember if I can divide things by each other, and what will make the inequality change direction.

2. I thought the section on doing proofs with sets was interesting. It didn't really occur to me that being able to prove set relations would be a useful skill, but now that I think of it I think it might be fun to try on the homework.

I feel like I don't spend very much time on the homework. I probably spend about an hour, maybe more if I'm typing it up in LaTeX. So far I feel like I have understood everything, and that the reading and lectures have helped prepare me for the homework assignments.