Section 5.2

I feel like I need more explanation as to how 5.3 was derived. It looks correct but I just feel like I need more explanation on it to understand it better. The max function was something new that I learned and I find it very useful to know about. The power iteration function also made the concept a lot more understandable to me. I thought it was very useful to have a way of finding the largest and smallest eigenvalues.