Off topic — I love to read these posts, they remind me how crappy my time was in university where I got to learn a ton of equations with no apparent use case, then I read these articles about the awesome things you could do with math and realize that I didn't take the time to appreciate my education. I would have loved to have an internship in one of these companies to put in practice what I was learning during that time, and not waste my education — specially the calculus classes — making presence in a bank writing mostly irrelevant code with no more requirement than basic math skills.