I wish all my math classes had started with beautiful music like that. Also, the way Prof. Milnor started off his class ("In order to start talking about diffe

I wish all my math classes had started with beautiful music like that. Also, the way Prof. Milnor started off his class ("In order to start talking about differential topology, I have to first give a few definitions…") really made me chuckle. As a former math student who had to sit through many painful and sloppy math lectures I very much appreciate this no-nonsense (albeit maybe a bit dry & stereotypical) approach to math.