It's a nice article and all, but it can never reach the greatness of this overly enthusiastic backtothefutureesque professor explaining curvature with a slice of pizza.
It's Cliff Stoll, not just some wacky guy. He is extremely famous among people who were interested in computer security in the 90s. I know that's not the sense of "hacker" that "hacker news" refers to, but still.
Yes. He wrote The Cuckoo's Egg for one. My uncle gave me the book when I was a kid. The first Java program I wrote was a sequence generator for the Morris Number Sequence [2] given to Stoll by Robert Morris Sr at the NSA: "What is the next number in the sequence 1, 11, 21, 1211, 111221?"
He did not mention that the curvature is the product of the minimum and maximum directions. Otherwise, a fair question would be that the gaussian curvature would be different depending on how we draw our lines. In the video, he happens to draw one direction along the fold of the paper, which gives the correct answer.
Good video though!
This is great, thanks for sharing!
Consider checking out some other videos on Numberphile/Computerphile channels. They work with many great minds.