2.6, due on September 23

First, it is important to note that I will not be at your office hours tomorrow! Not because I can't make it or because I don't want to come, but because I have already finished the homework assignment and I understand all of them! One thing I need to do is get a little clearer on my definitions, especially of quadratic residue, but also some older definitions that are make it hard to understand new things. I think lemma 2.6.1 is cool because it tells us how to quickly find or eliminate quadratic residues which, i think, are basically solutions. (maybe i'm not understanding) But if this does what I think, then it's a pretty sweet lemma. I don't really like using the "Legendre symbol" to mean quadratic reciprocity law because then it just feels like an extra two terms that I need to memorize.