Chapter 10 of 24 - Quadratic Reciprocity

Fun chapter. Squares are very important, turns out. Chapter was about methods of solving quadratic formulas modulo some prime.

Covered Euler's Criterion for quadratic residues, The Legendre symbol, Gauss's Lemma, and then the law of quadratic reciprocity.

I'll be looking at rings next. I've been waiting to investigate these things for a while...